Mark 7:3

(For the Pharisees and all the Jews--being, as they are, zealous for the traditions of the Elders--never eat without first carefully washing their hands,

Mark 7:13

thus nullifying God's precept by your tradition which you have handed down. And many things of that kind you do."

Galatians 1:14

and how in devotion to Judaism I outstripped many men of my own age among my people, being far more zealous than they on behalf of the traditions of my forefathers.

Colossians 2:8

Take care lest there be some one who leads you away as prisoners by means of his philosophy and idle fancies, following human traditions and the world's crude notions instead of following Christ.

Matthew 15:2-6

"Why do your disciples transgress the tradition of the Elders by not washing their hands before meals?"

Mark 7:5

So the Pharisees and Scribes put the question to Him: "Why do your disciples transgress the traditions of the Elders, and eat their food with unclean hands?"

Mark 7:7-10

But idle is their devotion while they lay down precepts which are mere human rules.'

Colossians 2:21-23

"Do not handle this;" "Do not taste that;" "Do not touch that other thing" --

1 Peter 1:18

knowing, as you do, that it was not with a ransom of perishable wealth, such as silver or gold, that you were set free from your frivolous habits of life which had been handed down to you from your forefathers,

Treasury of Scripture Knowledge

Summary

For the Pharisees, and all the Jews, except they wash their hands oft, eat not, holding the tradition of the elders.

General references

Bible References

The tradition

Mark 7:7
But idle is their devotion while they lay down precepts which are mere human rules.'
Matthew 15:2
"Why do your disciples transgress the tradition of the Elders by not washing their hands before meals?"
Galatians 1:14
and how in devotion to Judaism I outstripped many men of my own age among my people, being far more zealous than they on behalf of the traditions of my forefathers.
Colossians 2:8
Take care lest there be some one who leads you away as prisoners by means of his philosophy and idle fancies, following human traditions and the world's crude notions instead of following Christ.
1 Peter 1:18
knowing, as you do, that it was not with a ransom of perishable wealth, such as silver or gold, that you were set free from your frivolous habits of life which had been handed down to you from your forefathers,

General references

Luke 5:30
This led the Pharisees and Scribes of their party to expostulate with His disciples and ask, "Why are you eating and drinking with these tax-gatherers and notorious sinners?"