Berean Standard Bible (BSB)
Before the arrival of Jesus, John preached a baptism of repentance to all the people of Israel.
World English Bible (WEB)
before his coming, when John had first preached the baptism of repentance to Israel.
Strong's King James
When John{G2491} had first preached{G4296}{(G5660)} before{G4253} his{G846} coming{G4383}{G1529} the baptism{G908} of repentance{G3341} to all{G3956} the people{G2992} of Israel{G2474}.
The F.O.G *
(24) Yochanan (Yah's grace) proclaimed before His coming an immersion of returning-repentance to all Israel's people.
The F.O.G Message *
Young's Literal Translation
John having first preached, before his coming, a baptism of reformation to all the people of Israel;