Matthew 15:3

“But he answered and said unto them, etc.] Taking no notice of the tradition about eating bread without washing the hands, whether it was right or wrong; it being at most but an human tradition, of no moment and importance, whether it was broke or kept; he makes a very just recrimination, by putting another question to them, why do you also transgress the commandment of God by your tradition? suggesting, that, if his disciples were guilty, they were not so guilty as they themselves were; that his disciples, at most, were but guilty of the breach of an human precept, whereas they were guilty of the breach of a divine command; and that it was strange, that men who were so scrupulous of…”

“But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?--The charge is retorted with startling power: "The tradition they transgress is but man's, and is itself the occasion of heavy transgression, undermining the authority of God's law."”

“See also Mark 7:1-9. Then came to Jesus ... - Mark says that they saw the disciples of Jesus eating with unwashed hands. Matthew 15:2 Transgress the tradition of the elders - The world “elders” literally means “old men.” Here it means the “ancients,” or their “ancestors.” The “tradition of the elders” meant something handed down from one to another by memory; some precept or custom not commanded in the written law, but which scribes and Pharisees held themselves bound to observe. They supposed that when Moses was on Mount Sinai two sets of laws were delivered to him: one, they said, was recorded, and is that contained in the Old Testament; the other was handed down from father to son, and…”

“They wash not their hands when they eat bread - Food in general is termed bread in Hebrew; so that to eat bread is the same as to make a meal. Matthew 15:4”

“Why: Mat 7:3-5; Mar 7:6-8, Mar 7:13; Col 2:8, Col 2:23; Tit 1:14 Matthew 15:4”