'Knees' in the Bible

Rachel responded, "Here's my handmaid Bilhah. Go have sex with her. She can bear children on my knees so I can have children through her."

Then he provided him with a chariot as his second-in-command, outfitted with a group of people who shouted out in front of him, "Bow your knees!" And that's how Pharaoh set Joseph over the entire land of Egypt.

Joseph took them off his knees and then bowed low with his face to the ground.