John 3:22
After these things came Jesus and his disciples into the land of Judea; and there he tarried with them, and baptized.
Cross-reference
John 3:26
Historical context
In John 3:26, John's disciples report Jesus' baptizing — directly referencing the ministry described here.
John 4:2
Historical context
John 4:2 clarifies that Jesus himself did not baptize—only his disciples did, explaining the earlier statement.
John 4:3
Historical context
In John 4:3, Jesus leaves Judea for Galilee — continuing the geographical movement started here.
Acts 8:38
Parallel
Acts 8:38 shows Philip baptizing the eunuch—a later example of Christian baptism, continuing the practice begun by Jesus' disciples.