'I Am Not Worthy' in the Bible

John answered, saying to them all, I indeed baptize you with water; but one mightier than I cometh, the latchet of whose shoes I am not worthy to unloose: he will baptize you with the Holy Spirit, and with fire:

Then Jesus went with them. And when he was now not far from the house, the centurion sent friends to him, saying to him, Lord, trouble not thyself: for I am not worthy that thou shouldest enter under my roof;