'Prayer' in the Bible

But the angel said to him:Do not be afraid, Zechariah,because your prayer has been heard.Your wife Elizabeth will bear you a son,and you will name him John.

During those days He went out to the mountain to pray and spent all night in prayer to God.

and He said, “It is written, My house will be a house of prayer, but you have made it a den of thieves!”

When He got up from prayer and came to the disciples, He found them sleeping, exhausted from their grief.