'Knee' in the Bible

But what does the divine response say to him? "I have left for myself seven thousand people who have not bent the knee to Baal."

For it is written, "As I live, says the Lord, every knee will bow to me, and every tongue will praise God."

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