Matthew 15:2

"Why do your disciples violate the tradition of the [Jewish] elders? For they do not [ceremonially] wash their hands before eating [their meals]."

Luke 11:38

And when the Pharisee observed this, he was surprised that Jesus had not first washed himself ceremonially before the meal.

Colossians 2:8

Pay attention so that no one takes you [spiritually] captive through his philosophy and empty deception based on human tradition, according to the principles of the world and not according to Christ.

Mark 7:2

They had observed some of His disciples eating their food with contaminated, that is, [ceremonially] unwashed hands.

Mark 7:5

The Pharisees and experts in the law of Moses asked Jesus, "Why do your disciples not live according to the traditions of the Jewish elders, but [instead] eat their food with contaminated [i.e., ceremonially unwashed] hands?"

Colossians 2:20-23

Since you died with Christ to the basic principles of the world, [then] why, as though you [still] lived in [harmony with] the world, do you submit yourselves to [its] rules, [such as]:

1 Peter 1:18

You [should] know that you were bought back [from Satan], from your useless way of life, inherited from your forefathers, not with such perishable things as silver and gold,

Treasury of Scripture Knowledge

Summary

Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat bread.

General references

Bible References

Transgress

Mark 7:2
They had observed some of His disciples eating their food with contaminated, that is, [ceremonially] unwashed hands.
Colossians 2:8
Pay attention so that no one takes you [spiritually] captive through his philosophy and empty deception based on human tradition, according to the principles of the world and not according to Christ.
1 Peter 1:18
You [should] know that you were bought back [from Satan], from your useless way of life, inherited from your forefathers, not with such perishable things as silver and gold,

General references

Matthew 23:24
You blind leaders, who strain out a [tiny] gnat [i.e., from your drinking water] and [yet] swallow a [whole] camel.
Mark 7:5
The Pharisees and experts in the law of Moses asked Jesus, "Why do your disciples not live according to the traditions of the Jewish elders, but [instead] eat their food with contaminated [i.e., ceremonially unwashed] hands?"