John 1:20
And he acknowledged and denied not, and acknowledged, I am not the Christ.
Matthew 3:11-12
I indeed baptise you with water to repentance, but he that comes after me is mightier than I, whose sandals I am not fit to bear; he shall baptise you with the Holy Spirit and fire;
Mark 1:7-8
And he preached, saying, There comes he that is mightier than I after me, the thong of whose sandals I am not fit to stoop down and unloose.
Luke 3:15-17
But as the people were in expectation, and all were reasoning in their hearts concerning John whether he might be the Christ,
John 3:28-36
Ye yourselves bear me witness that I said, I am not the Christ, but, that I am sent before him.