'Baptism of Repentance' in the Bible

John was there baptizing in the wilderness, proclaiming a baptism of repentance for the forgiveness of sins.

And he went into all the surrounding region of the Jordan, preaching a baptism of repentance for the forgiveness of sins,

Before {his coming} John had publicly proclaimed a baptism of repentance to all the people of Israel.

And Paul said, "John baptized [with] a baptism of repentance, telling the people that they should believe in the one who was to come after him--that is, in Jesus."