'Baptism' in the Bible

You know what happened throughout Judea, beginning in Galilee after the baptism that John preached.

Before Jesus' appearance, John had already preached a baptism of repentance to all the people in Israel.

He had been instructed in the Lord's way, and with spiritual fervor he kept speaking and teaching accurately about Jesus, although he knew only about John's baptism.

He then asked, "Then into what were you baptized?" They answered, "Into John's baptism."