'I Am Not Worthy' in the Bible

John responded to all, saying; I indeed baptize you with water; but there cometh One more powerful than I, the latchet of His sandals I am not worthy to loose; He will baptize you with the Holy Ghost and fire.

And Jesus went along with them. And already He being not far from the house, the centurion sent friends to Him, saying to Him, Lord, be not troubled: for I am not worthy that you may come in under my roof: