1 Samuel 7:8
and said to Samuel, "Cease not to cry unto the LORD our God for us, that he may save us out of the hands of the Philistines."
Isaiah 37:4
The LORD thy God, no doubt, hath well considered the words of Rabshakeh, whom his lord the king of the Assyrians hath sent, to defy and blaspheme the living God: with such words as the LORD thy God hath heard right well. And therefore lift up thy prayer for the remnant that yet are left.'"
1 Samuel 12:19-24
Then said all the people unto Samuel, "Pray for thy servants unto the LORD thy God, that we die not: for we have sinned in asking us a king, beside all the sins that ever we did."
Isaiah 62:1
For Zion's sake therefore will I not hold my tongue, and for Jerusalem's sake I will not cease: until their righteousness break forth as a shining light, and their salvation as a burning lamp.
Isaiah 62:6-7
Upon the walls of Jerusalem, I have set keepers which shall never cease, neither by day nor yet by night.
James 5:16
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.