Exodus 17:11

And when Moses held up his hand, Israel had the better. And when he let his hand down, Amalek had the better.

I will, therefore, that the men pray every where, lifting up pure hands without wrath, or doubting.

Knowledge your faults one to another: and pray one for another, that ye may be healed. The prayer of a righteous man availeth much, if it be fervent.

Whensoever I call upon thee, then shall mine enemies be put to flight; whereby I know that thou art my God.

He put forth a similitude unto them, signifying that men ought always to pray, and not to be weary,

Treasury of Scripture Knowledge

And it came to pass, when Moses held up his hand, that Israel prevailed: and when he let down his hand, Amalek prevailed.

Whensoever I call upon thee, then shall mine enemies be put to flight; whereby I know that thou art my God.

He put forth a similitude unto them, signifying that men ought always to pray, and not to be weary,

I will, therefore, that the men pray every where, lifting up pure hands without wrath, or doubting.

Knowledge your faults one to another: and pray one for another, that ye may be healed. The prayer of a righteous man availeth much, if it be fervent.