John 1:20

And he confessed [truthfully] and did not deny [that he was only a man], but acknowledged, “I am not the Christ (the Messiah, the Anointed)!”

Matthew 3:11-12

“As for me, I baptize you with water because of [your] repentance [that is, because you are willing to change your inner self—your old way of thinking, regret your sin and live a changed life], but He (the Messiah) who is coming after me is mightier [more powerful, more noble] than I, whose sandals I am not worthy to remove [even as His slave]; He will baptize you [who truly repent] with the Holy Spirit and [you who remain unrepentant] with fire (judgment).

Mark 1:7-8

And he was preaching, saying, “After me comes He who is mightier [more powerful, more noble] than I, and I am not worthy to stoop down and untie the straps of His sandals [even as His slave].

Luke 3:15-17

Now the people were in a state of expectation, and all were wondering in their hearts about John, as to whether he was the Christ (the Messiah, the Anointed).

John 3:28-36

You yourselves are my witnesses that I stated, ‘I am not the Christ (the Messiah, the Anointed),’ but, ‘I have [only] been sent ahead of Him [as His appointed forerunner and messenger to announce and proclaim His coming].’

Treasury of Scripture Knowledge

Summary

And he confessed, and denied not; but confessed, I am not the Christ.

Bible References

General references

John 3:28
You yourselves are my witnesses that I stated, ‘I am not the Christ (the Messiah, the Anointed),’ but, ‘I have [only] been sent ahead of Him [as His appointed forerunner and messenger to announce and proclaim His coming].’
Matthew 3:11
“As for me, I baptize you with water because of [your] repentance [that is, because you are willing to change your inner self—your old way of thinking, regret your sin and live a changed life], but He (the Messiah) who is coming after me is mightier [more powerful, more noble] than I, whose sandals I am not worthy to remove [even as His slave]; He will baptize you [who truly repent] with the Holy Spirit and [you who remain unrepentant] with fire (judgment).
Mark 1:7
And he was preaching, saying, “After me comes He who is mightier [more powerful, more noble] than I, and I am not worthy to stoop down and untie the straps of His sandals [even as His slave].
Luke 3:15
Now the people were in a state of expectation, and all were wondering in their hearts about John, as to whether he was the Christ (the Messiah, the Anointed).