1Ki 8:54 . . , he arose from before the altar of the LORD, from kneeling on his knees with his hands spread up to heaven.
2 Ch 6:13 . . kneeled down upon his knees before all the congregation of Israel, and spread forth his hands toward heaven,
Dan 6:10 . . he kneeled upon his knees three times a day, and prayed, and gave thanks before his God, as he did aforetime.
Bowing was another demonstration of deference, or worship when praying.
Gen 48:12 . . . he bowed himself with his face to the earth.