'Knee' in the Bible

But what is God’s response to him? “I have kept for Myself seven thousand men who have not bowed the knee to Baal.”

For it is written [in Scripture],“As I live, says the Lord, every knee shall bow to Me,And every tongue shall give praise to God.”

so that at the name of Jesus every knee shall bow [in submission], of those who are in heaven and on earth and under the earth,