'Baptism' in the Bible

beginning with the baptism by John [at the outset of Jesus’ ministry] until the day when He was taken up from us—one of these men must become a witness with us [to testify] of His resurrection.”

you know the things that have taken place throughout Judea, starting in Galilee after the baptism preached by John—

Before His coming John [the Baptist] had preached a baptism of repentance to all the people of Israel.

This man had been instructed in the way of the Lord, and being spiritually impassioned, he was speaking and teaching accurately the things about Jesus, though he knew only the baptism of John;

And he asked, “Into what then were you baptized?” They said, “Into John’s baptism.”

Paul said, “John performed a baptism of repentance, continually telling the people to believe in Him who was coming after him, that is, [to confidently accept and joyfully believe] in Jesus [the Messiah and Savior].”