1 Samuel 7:8
The Israelites said to Samuel, "Keep crying out to the Lord our God so that he may save us from the hand of the Philistines!"
Isaiah 37:4
Perhaps the Lord your God will hear all these things the chief adviser has spoken on behalf of his master, the king of Assyria, who sent him to taunt the living God. When the Lord your God hears, perhaps he will punish him for the things he has said. So pray for this remnant that remains.'"
1 Samuel 12:19-24
All the people said to Samuel, "Pray to the Lord your God on behalf of us -- your servants -- so we won't die, for we have added to all our sins by asking for a king."
Isaiah 62:1
"For the sake of Zion I will not be silent; for the sake of Jerusalem I will not be quiet, until her vindication shines brightly and her deliverance burns like a torch."
Isaiah 62:6-7
I post watchmen on your walls, O Jerusalem; they should keep praying all day and all night. You who pray to the Lord, don't be silent!
James 5:16
So confess your sins to one another and pray for one another so that you may be healed. The prayer of a righteous person has great effectiveness.