Psalm 55:17

Now when Daniel knew that the written document was signed, he entered his house (now in his roof chamber he had windows open toward Jerusalem); and he continued kneeling on his knees three times a day, praying and giving thanks before his God, as he had been doing previously.

Now Peter and John were going up to the temple at the ninth hour, the hour of prayer.

And on the next day, as they were on their way and approaching the city, Peter went up on the housetop about the sixth hour to pray.