1 John 5:16

If anyone sees his brother committing a sin that does not lead to death, he will ask and God will grant him life; yea, He will grant it to any who do not commit a sin that leads to death. There is a sin that leads to death; I do not say that one should pray for that.

Acts 8:24

So Simon answered, "Both of you beg the Lord for me that none of the things you have said may befall me!"

James 5:15

and the prayer that is offered in faith will save the sick man; the Lord will raise him to health, and if he has committed sins, he will be forgiven.

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
So Simon answered, "Both of you beg the Lord for me that none of the things you have said may befall me!"
James 5:15
and the prayer that is offered in faith will save the sick man; the Lord will raise him to health, and if he has committed sins, he will be forgiven.
1 John 5:16
If anyone sees his brother committing a sin that does not lead to death, he will ask and God will grant him life; yea, He will grant it to any who do not commit a sin that leads to death. There is a sin that leads to death; I do not say that one should pray for that.