Mark 7:19

Because it entereth not into his heart, but into the belly, and goeth out into the draught, purging all meats?

Mark 7:19 belongs to Christ's answer when the Pharisees charged His disciples with eating bread without ceremonially washing their hands. The dispute was not over God's law but over human tradition requiring purification before eating. Those purification rules were numberless and were treated as more sacred than the law itself, even preferred above the commandments given from Sinai.

Neglect of these washings was counted as a very grievous sin, while keeping them made life a continual struggle against ceremonial defilement with endless washings. This preoccupation with washings turned minds away from the great principles of God's law. Christ and His disciples did not observe these ceremonial washings.