John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.
Berean Study Bible (BSB) - Mark 1:4 >John the Baptist appeared in the wilderness, preaching a baptism of repentance for the forgiveness of sins.
Textus Receptus (TR) - Mark 1:4 >Ἐγένετο Ἰωάννης βαπτίζων ἐν τῇ ἐρήμῳ, καὶ κηρύσσων βάπτισμα μετανοίας εἰς ἄφεσιν ἁμαρτιῶν.