Contradiction with Romans 3:23
Contradicts by stating all have sinned, whereas 2 Kings 5:14 might suggest Naaman's cleansing signified his righteousness or special favor.
Romans 3:23: For all have sinned, and come short of the glory of God;
Contradiction with Isaiah 64:6
Contradicts by stating all our righteous acts are like filthy rags, while Naaman's cleansing in the Jordan might imply worthiness through action.
Isaiah 64:6: But we are all as an unclean [thing], and all our righteousnesses [are] as filthy rags; and we all do fade as a leaf; and our iniquities, like the wind, have taken us away.
Contradiction with John 3:5
Contradicts by emphasizing a new birth through water and the Spirit, whereas Naaman's cleansing was physical and ritualistic.
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.
Contradiction with 1 Peter 3:21
Contradicts by suggesting baptism saves as an appeal to God, whereas Naaman's act was a direct command for physical healing, not spiritual salvation.
1 Peter 3:21: The like figure whereunto [even] baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God,) by the resurrection of Jesus Christ:
Contradiction with Hebrews 10:4
Contradicts by stating it's impossible for the blood of bulls and goats to take away sins, paralleling with Naaman's cleansing via ceremonial washing not achieving true purification.
Hebrews 10:4: For [it is] not possible that the blood of bulls and of goats should take away sins.