'I Am Not Worthy' in the Bible

I indeed baptize you with water unto repentance; but he that cometh after me is mightier than I; whose shoes I am not worthy to bear; he shall baptize you with the Holy Ghost and with fire:

The centurion answered and said, Lord, I am not worthy, that thou shouldst come under my roof: but speak the word only, and my servant shall be healed.

And proclaimed, saying, There cometh after me one mightier than I, the latchet of whose shoes I am not worthy to stoop down and unloose.

whether he were not the Christ, 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 shall baptize you with the Holy Ghost 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 come under my roof.

He it is, who coming after me, is preferred before me, whose shoes latchet I am not worthy to unloose.

And as John was fulfilling his course, he said, Whom think ye that I am? I am not he. But behold one cometh after me, whose shoes of his feet I am not worthy to loose.