'I Am Not Worthy' in the Bible

John answered, saying unto them all, I indeed baptize you with water; but one mightier than I comes, the thong of whose shoes I am not worthy to untie: he shall 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 unto him, Lord, trouble not yourself: for I am not worthy that you should enter under my roof: