'Knees' in the Bible

And a leper came to Him, begging Him and falling on his knees before Him, saying, “If You are willing, You are able to make me clean.”

Seeing Jesus from a distance, he ran up and bowed down before Him [in homage];

They kept beating Him on the head with a reed and spitting on Him, and kneeling and bowing in [mock] homage to Him.