when John had first preached before his coming the baptism of repentance to all the people of Israel.

For whose coming John made ready the way by preaching to all the people of Israel the baptism which goes with a change of heart.

αφου ο Ιωαννης προ της ελευσεως αυτου προεκηρυξε βαπτισμα μετανοιας εις παντα τον λαον του Ισραηλ.

When John had first preached before his coming the baptism of repentance to all the people of Israel.