1 John 5:16

If any one see his brother commit a sin which is not unto death, let him pray for him, and God will give him life, that is for them that do not sin unto death. There is a sin unto death: and for that I do not say that he should pray.

Acts 8:24

And Simon answered, and said, Do ye pray to the Lord for me, that none of the things which ye have spoken may come upon me.

James 5:15

and the prayer of faith shall save the sick, and the Lord will raise him up; and if he have committed sins, they shall be forgiven him.

Treasury of Scripture Knowledge

Summary

And all the people said unto Samuel, Pray for thy servants unto the LORD thy God, that we die not: for we have added unto all our sins this evil, to ask us a king.

Bible References

Pray for thy

Acts 8:24
And Simon answered, and said, Do ye pray to the Lord for me, that none of the things which ye have spoken may come upon me.
James 5:15
and the prayer of faith shall save the sick, and the Lord will raise him up; and if he have committed sins, they shall be forgiven him.
1 John 5:16
If any one see his brother commit a sin which is not unto death, let him pray for him, and God will give him life, that is for them that do not sin unto death. There is a sin unto death: and for that I do not say that he should pray.