Mark 1:4-5 John came baptizing in the wilderness and preaching the baptism of repentance for forgiveness of sins.

WEB_Strongs⁽ⁱ⁾

4 G2491 John G1096 came G907 baptizing G1722 in G2048 the wilderness G2532 and G2784 preaching G908 the baptism G3341 of repentance G1519 for G859 forgiveness G266 of sins.

5 G3956 All G5561 the country G2449 of Judea G2532 and G2415 all those of Jerusalem G1607 went out G4314 to G846 him. G2532 They G907 were G907 baptized G5259 by G846 him G1722 in G2446 the Jordan G4215 river, G1843 confessing G846 their G266 sins.