Matthew 15:17
Perceive ye not yet, that whatsoever entereth into the mouth, goeth into the belly, and is cast out into the draught?
JESUS said that what a man eats does not defile him because it goes out through the draught. Far more powerful, because it is spiritual activation, is submitting self for baptism. But it is THE REDEEMED who do this, not to obtain salvation but to be OBEDIENT.