'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 carry: He shall baptize you with the holy Spirit and with fire.

But the centurion answering said, Lord, I am not worthy that Thou shouldst come under my roof, but speak the word, and my servant will be healed:

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

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:

that cometh after me, but is preferred before me, the latchet of whose shoe I am not worthy to unloose.

And as John was fulfilling his course, he said, Whom do ye take me to be? I am not He: but behold there cometh one after me, the shoes of whose feet I am not worthy to unloose.