Contradiction with Matthew 28:19
Jesus commands baptism.
Matthew 28:19: Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: [teach...: or, make disciples, or, Christians of all nations]
Contradiction with Mark 16:16
Belief and baptism are linked for salvation.
Mark 16:16: He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
Contradiction with John 3:5
Necessity of being born of water (baptism) for entry into the kingdom of God.
John 3:5: Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and [of] the Spirit, he cannot enter into the kingdom of God.