Luke 2:37
She was very old; from girlhood she had lived seven years with a husband, and now had been a widow eighty years. She never left the temple, but continued to worship all day and all night with fastings and prayers.
Acts 10:30
Then Cornelius said, "Four days ago, about this hour, three o'clock in the afternoon, I was praying in my house, and all at once a man in dazzling clothing stood before me,
James 4:8-10
Draw near to God and He will draw near to you. Get your hands clean, you sinners. Get your hearts purified, you double-minded.
James 5:16-18
So practice confessing your sins to one another, and praying for one another, that you may be cured. An upright man's prayer, when it keeps at work, is very powerful.