Bible Verses About Public Prayer: God promises to hear

Even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt offerings and their sacrifices shall be accepted upon mine altar; for mine house shall be called an house of prayer for all people.

Peter therefore was kept in prison: but prayer was made without ceasing of the church unto God for him.

Then hear thou from the heavens, even from thy dwelling place, their prayer and their supplications, and maintain their cause, and forgive thy people which have sinned against thee.

And it came to pass, as we went to prayer, a certain damsel possessed with a spirit of divination met us, which brought her masters much gain by soothsaying:

Now Peter and John went up together into the temple at the hour of prayer, being the ninth hour.