John 1:20
And he confessed, and denied it not; but acknowledged, I am not the Messiah.
Matthew 3:11-12
I indeed baptize you with water unto repentance: but he that is coming after me is mightier than I, whose sandals I am not worthy to carry: he shall baptize you with the Holy Spirit, and with fire:
Mark 1:7-8
And he preached, saying, One mightier than I is coming after me, the string of whose shoes I am not worthy, stooping down, to unloose.
Luke 3:15-17
Now when the people were in expectation, and many reasoned in their hearts respecting John, whether he were the Messiah,
John 3:28-36
Ye yourselves bear me witness, that I said, I am not the Messiah, but that I am sent before him.