Matthew 15:2

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

Luke 11:38

And when the pharisee saw it he wondered that He did not wash first, before dinner.

Colossians 2:8

Take heed least any one make a prey of you by philosophy and vain deceit, according to the tradition of men, after the elements of the world, and not after Christ:

Mark 7:2

and when they saw some of his disciples eating with impure (that is, unwashed) hands, they found fault:

Mark 7:5

Then the pharisees and the scribes ask Him, Why do not thy disciples walk according to the tradition of the ancients, but eat without washing their hands?

Colossians 2:20-23

If therefore ye be dead with Christ from the elements of the world; why, as if living in the world, are ye subject to ceremonial ordinances,

1 Peter 1:18

knowing that ye were redeemed from your vain conversation learned by tradition from your fathers, not with corruptible 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
and when they saw some of his disciples eating with impure (that is, unwashed) hands, they found fault:
Colossians 2:8
Take heed least any one make a prey of you by philosophy and vain deceit, according to the tradition of men, after the elements of the world, and not after Christ:
1 Peter 1:18
knowing that ye were redeemed from your vain conversation learned by tradition from your fathers, not with corruptible things, as silver and gold;

General references

Matthew 23:24
Blind guides, who strain out a gnat, and swallow a camel!
Mark 7:5
Then the pharisees and the scribes ask Him, Why do not thy disciples walk according to the tradition of the ancients, but eat without washing their hands?