John 1:20
And he confessed, and denied not; and he confessed, "I am not the Christ."
Matthew 3:11-12
"I, indeed, immerse you in water unto repentance, but He Who is coming after me is mightier than I, whose sandals I am not worthy to bear, He will immerse you in the Holy Spirit and fire;
Mark 1:7-8
And he preached, saying, "There cometh after me One Who is mightier than I, the latchet of Whose shoes I am not worthy, stooping down, to loose.
Luke 3:15-17
And, as the people were in expectation, and all were reasoning in their hearts concerning John, whether perhaps he himself were the Christ,
John 3:28-36
Ye yourselves bear me testimony, that I said, 'I am not the Christ, but that I have been sent before Him.'