And it came to pass, when Moses held up his hand, that Israel prevailed: and when he let down his hand, Amalek prevailed.
Psalm 56:9
When I cry unto Thee, then shall mine enemies turn back! This I know, for God is for me.
Luke 18:1
And He spoke a parable unto them to this end, that men ought always to pray and not to faint,
1 Timothy 2:8
It is my will therefore that men pray everywhere, lifting up holy hands without wrath and doubting.
James 5:16
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.