Job 42;10

And the Lord turned the captivity of Job, when he prayed for his friends, also, the Lord gave Job twice as much as he had before.

Matthew 5;44

But I say unto you, love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;

Hebrews 13;18

Pray for us: for we trust we have good conscience, in all things willing to live honestly,

John 17;9

I pray for them: I pray not for the world, but for them which thou hast given me; for they are thine, and thine are mine, and I am glorified in them.

We are instructed to pray for one another, not to one another, We are not asked to pray for on another, we are told to do so.

If you ask your Christian brother or sister to pray for you, why is this not seeking another mediator? The prayer is not to the brother or sister but to the Father, in their behalf.

The apostle Paul prays for the living and prays for other Christians. So it seems perfectly natural for Christians to ask for prayer from other living Christians.

Eph 1:16 Cease not to give thanks for you, making mention of you in my prayers

James 5:16 - ... pray one for another ...

Among many others which others have pointed out.

I think the whole theology around Catholics praying to and seeking prayer from "dead saints" is why this would even come up. The definition of Saint (hagios) is most holy thing, sacred, pure, blameless, ceremonially consecrated.

Catholics decide with prayer who gets to be a Saint. But in their deciding I can't see any scriptural support. If I'm not mistaken most(all?) of the catholic saints that are defined by their own definition of saint are dead.

Many protestants and Catholics believe a saint is someone who lives an exemplary life (taking on the idea of purity alone). Catholics I believe go further and define them as someone who has also done some confirmed miracles.

The problem is, none of this is scripture. To be a saint you become a believer. All Christians who believe on Jesus are Saints. It simply means you are set aside consecrated (dedicated) for the Gospel of Jesus Christ and that we're to be in the world not of the world. Called to be different from the world and all the evil that it does.

Let me show you from scripture.

Romans 1:7 To all that be in Rome, beloved of God, called to be saints: ..."

Better still, do you beleive the Corinthian church were part of the sainthood? that messed up church where men were having sex with their own mothers among other atrocious things. And Paul says, don't you know you're called to be saints??

1 Cor 1:2 Unto the church of God which is at Corinth, to them that are sanctified in Christ Jesus, called to be saints, with all that in every place call upon the name of Jesus Christ our Lord, both their's and our's:

So for a protestant, what we would do is to pray for Christian believers who we also believe are the saints. We're not praying to dead people.

In addition to lonesomeday's excellent answer I would also like to cite the following Scriptures where both Paul and James indicated that others should offer intercessory prayer for either them or others.

All Scripture is quoted from the King James translation.

In the following instance we see Paul asking for their prayers, to aid him in his work for the Kingdom of God, and as most Protestants that I know feel it is good that we ask others to pray for us in as much as it helps us to fulfill further the Kingdom of God.

Rom 15:30 through 32 Now I beseech you, brethren, for the Lord Jesus Christ's sake, and for the love of the Spirit, that ye strive together with me in your prayers to God for me; That I may be delivered from them that do not believe in Judaea; and that my service which I have for Jerusalem may be accepted of the saints; That I may come unto you with joy by the will of God, and may with you be refreshed.

In the book of James we find that Church Elders are exhorted to pray for and anoint the sick, also we see that we are told to confess our faults to one another and have them pray for our redemption.

James 5:14 through 16 Is any sick among you? let him call for the elders of the church; and let them pray over him, anointing him with oil in the name of the Lord: And the prayer of faith shall save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him. Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.

In the book of acts we find Peter's intercession for the widows of Joppa, to bring back Dorcas from the dead, through intercessory prayer.

Acts 9:39 and 40 Then Peter arose and went with them. When he was come, they brought him into the upper chamber: and all the widows stood by him weeping, and shewing the coats and garments which Dorcas made, while she was with them. But Peter put them all forth, and kneeled down, and prayed; and turning him to the body said, Tabitha, arise. And she opened her eyes: and when she saw Peter, she sat up.

I must, however, disagree with your statement about having anyone else pray for us; we consider to be dishonoring Jesus. Only in the asking for the forgiveness of our sins do we believe that we alone must pray directly to Jesus for forgiveness. Those sins belong exclusively to us, and for that we must ask Jesus to personally intercede with the Father. According to the following Scripture only Jesus can do that since he alone is the propitiation for our sins.

1st John 2:1 and 2 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous: And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.

For my part why should I pray to a dead Saint, when I have both a live Jesus as intercessor and Father God to whom Jesus said to pray directly in the Lords prayer.

I think the short answer is that there is Biblical precedent for this sort of intercessory prayer.

Here are a few examples:

2 Corinthians 1:11 (ESV)

You also must help us by prayer, so that many will give thanks on our behalf for the blessing granted us through the prayers of many.

Philippians 1:19 (ESV)

for I know that through your prayers and the help of the Spirit of Jesus Christ this will turn out for my deliverance,

1 Timothy 2:1 (ESV)

First of all, then, I urge that supplications, prayers, intercessions, and thanksgivings be made for all people,

James 5:14 (ESV)

Is anyone among you sick? Let him call for the elders of the church, and let them pray over him, anointing him with oil in the name of the Lord.

Philemon 1:22 (ESV)

At the same time, prepare a guest room for me, for I am hoping that through your prayers I will be graciously given to you.

As a sort of longer answer (and personal observation/understanding), I think it's an important element for community and a good way for Christians to minister to each other. The precedent it there for us to pray for one another, and sharing our concerns with one another is a good way to build community, and it offers a practical way to fulfill the duty to pray for one another by giving us specific things to pray for.

There are a variety of things going on here. (FWIW, I'm an Anglican who holds to the Catholic faith, so I'm not explaining my own beliefs here. I'll try as best I can to give a fair account of others' beliefs.)

Idolatry

Many Protestants believe that prayer should only be directed at God and that prayer to anything else is ipso facto idolatry. To pray to saints for their help would contravene I Timothy 2.5, for instance. There is no clear biblical warrant for prayer to the saints. By contrast, there is plainly biblical warrant for praying for other living people, so that plainly is not idolatry.

We could leave it there, and many would. But this wouldn't really answer the Catholic position, because Catholics believe that asking the saints for intercession is no different to asking a living friend for intercession. So we have to look at two other aspects.

The authority of the Church

"Who's a saint?"

This question underpins a major objection here. According to the Catholic faith, the Church is able to define positively those who have been judged favourably in the particular judgement and have been purified in Purgatory and who now are in the presence of God. Protestants do not believe the Church has this ability to define who is a saint.

Praying to saints, therefore, relies on a particular view of Church authority and the nature of religious knowledge.

Soul sleep

A final reason for denying prayer to the saints is the idea of soul sleep, historically a very important Protestant doctrine. (William Tyndale and Martin Luther in particular.) This is the belief that the souls of the departed are not conscious between death and the Last Day, and so they are incapable of intervening by prayer on our behalf.

It's not a doctrine much held today, but it was highly prevalent in the past and had a significant impact on much Protestant theology regarding the dead.