'Baptism' in the Bible

beginning from the baptism of John, to the day that he was received up from us, of these one must become a witness with us of his resurrection."

you yourselves know what happened, which was proclaimed throughout all Judea, beginning from Galilee, after the baptism which John preached;

before his coming, when John had first preached the baptism of repentance to Israel.

This man had been instructed in the way of the Lord; and being fervent in spirit, he spoke and taught accurately the things concerning Jesus, although he knew only the baptism of John.

He said, "Into what then were you baptized?" They said, "Into John's baptism."

Paul said, "John indeed baptized with the baptism of repentance, saying to the people that they should believe in the one who would come after him, that is, in Jesus."