John 1:20

and he confessed and did not deny, and confessed -- 'I am not the Christ.'

Matthew 3:11-12

'I indeed do baptize you with water to reformation, but he who after me is coming is mightier than I, of whom I am not worthy to bear the sandals, he shall baptize you with the Holy Spirit and with fire,

Mark 1:7-8

and he proclaimed, saying, 'He doth come -- who is mightier than I -- after me, of whom I am not worthy -- having stooped down -- to loose the latchet of his sandals;

Luke 3:15-17

And the people are looking forward, and all are reasoning in their hearts concerning John, whether or not he may be the Christ;

John 3:28-36

ye yourselves do testify to me that I said, I am not the Christ, but, that I am having been sent before him;

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
ye yourselves do testify to me that I said, I am not the Christ, but, that I am having been sent before him;
Matthew 3:11
'I indeed do baptize you with water to reformation, but he who after me is coming is mightier than I, of whom I am not worthy to bear the sandals, he shall baptize you with the Holy Spirit and with fire,
Mark 1:7
and he proclaimed, saying, 'He doth come -- who is mightier than I -- after me, of whom I am not worthy -- having stooped down -- to loose the latchet of his sandals;
Luke 3:15
And the people are looking forward, and all are reasoning in their hearts concerning John, whether or not he may be the Christ;