Mark 1:4
There came John baptising in the wilderness, and preaching the baptism of repentance for remission of sins.
Luke 1:77
to give knowledge of deliverance to his people by the remission of their sins
Matthew 3:1-2
Now in those days comes John the baptist, preaching in the wilderness of Judaea,
Matthew 3:6
and were baptised by him in the Jordan, confessing their sins.
Matthew 3:11
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;
Luke 3:2-3
in the high priesthood of Annas and Caiaphas, the word of God came upon John, the son of Zacharias, in the wilderness.
John 3:23
And John also was baptising in Aenon, near Salim, because there was a great deal of water there; and they came to him and were baptised:
Acts 10:37
ye know; the testimony which has spread through the whole of Judaea, beginning from Galilee after the baptism which John preached --
Acts 13:24-25
John having proclaimed before the face of his entry among the people the baptism of repentance to all the people of Israel.
Acts 19:3-4
And he said, To what then were ye baptised? And they said, To the baptism of John.
Acts 22:16
And now why lingerest thou? Arise and get baptised, and have thy sins washed away, calling on his name.