'Prayer' in the Bible

“So when you spread out your hands in prayer,I will hide My eyes from you;Yes, even though you multiply prayers,I will not listen.Your hands are covered with blood.

O Lord, they sought You in distress;They could only whisper a prayer,Your chastening was upon them.

Perhaps the Lord your God will hear the words of Rabshakeh, whom his master the king of Assyria has sent to reproach the living God, and will rebuke the words which the Lord your God has heard. Therefore, offer a prayer for the remnant that is left.’”

“Go and say to Hezekiah, ‘Thus says the Lord, the God of your father David, “I have heard your prayer, I have seen your tears; behold, I will add fifteen years to your life.

Even those I will bring to My holy mountainAnd make them joyful in My house of prayer.Their burnt offerings and their sacrifices will be acceptable on My altar;For My house will be called a house of prayer for all the peoples.”