Acts 19:3

οὖν : presupposes that if they had been baptised into the name of Jesus, they would have received the Spirit at Baptism. εἰς : “to baptise into” (R.V.) may have been suggested by the original practice to baptise by dipping or plunging, see Humphry, Comment. on R. V., in loco. εἰς τὸ Ἰ. βάπτισμα, i.e., into or unto repentance. For the strange notion that they were baptised into John as the Messiah see Hackett's note.