'I Am Not Worthy' in the Bible

John answered and said to them all, I indeed baptize you with water; but a mightier than I is coming, whose shoes I am not worthy to untie: He will baptize you with the holy Spirit, and with fire;

So Jesus went with them. And when He was now not far from the house, the centurion sent some of his friends to Him, saying Lord, trouble not thyself, for I am not worthy that thou shouldst enter under my roof: