Matthew to Mark
Link between Matthew and Mark.
Baptism
19Therefore go and disciple all peoples and baptize them in the name of the father and the son and the spirit of the holy.
20Teach them to obey everything that I have commanded you. I am with you all the days to the end of the world. Amen. (Matthew 28:19-20 BRB)
4John was in the wilderness baptizing and preaching the baptism of repentance for the forgiveness of sins. H Acts 13:24 (Mark 1:4 BRB)