John 1:20
Who art thou? and he confessed and denied not, and confessed that, I am not the Christ.
Matthew 3:11-12
I indeed baptize you with water unto repentance, but there is One coming after me more powerful than I, whose sandals I am not worthy to carry; He will baptize you with the Holy Ghost and fire.
Mark 1:7-8
And he proclaimed, saying, I indeed baptized you with water; but One cometh after me more powerful than I; the latchet of His sandals I am not worthy, having stooped down, to loose,
Luke 3:15-17
And the people waiting and all reasoning in their hearts concerning John, lest he might be the Christ.
John 3:28-36
You are witnessing to me, that I said, I am not the Christ, but that I am sent before Him.