'Knee' in the Bible

And when they had platted a crown of thorns, they put it upon his head, and a reed in his right hand: and they bowed the knee before him, and mocked him, saying, Hail, King of the Jews!

And they were smiting him on the head with a reed, and were spitting on him, and having bent the knee, were bowing to him,

But what saith the answer of God unto him? I have reserved to myself seven thousand men, who have not bowed the knee to the image of Baal.

For it is written, As I live, saith the Lord, every knee shall bow to me, and every tongue shall confess to God.

For this reason, on bended knee I beseech the Father,

That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth;