Mark 7:3

For the Pharisees and all of the Jews do not eat until they have ceremoniously washed their hands in obedience to the tradition of the elders;

Mark 7:13

Thus by your tradition which you have handed down you set at naught the word of God; and you do many other things like that."

Galatians 1:14

and how in my zeal for Judaism I outstripped many of my own age and nation, in my special zeal for the traditions of my forefathers.

Colossians 2:8

Take care lest any man drag you away captive by his philosophy which is a vain deceit, following the traditions of men and the world's crude notions, and not Christ.

Matthew 15:2-6

"Why do your disciples keep transgressing the tradition of the elders by not washing their hands before eating?"

Mark 7:5

So the Pharisees and Scribes asked him. "Why do your disciples not follow the traditions of the elders? Why do they eat with 'common' unwashed hands?"

Mark 7:7-10

But in vain do they worship me, For their teaching is only human precepts.'"

1 Peter 1:18

For you well know that not with perishable things, with silver or gold, were you redeemed from the emptiness of your manner of life, received by tradition from your ancestors;

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 in vain do they worship me, For their teaching is only human precepts.'"
Matthew 15:2
"Why do your disciples keep transgressing the tradition of the elders by not washing their hands before eating?"
Galatians 1:14
and how in my zeal for Judaism I outstripped many of my own age and nation, in my special zeal for the traditions of my forefathers.
Colossians 2:8
Take care lest any man drag you away captive by his philosophy which is a vain deceit, following the traditions of men and the world's crude notions, and not Christ.
1 Peter 1:18
For you well know that not with perishable things, with silver or gold, were you redeemed from the emptiness of your manner of life, received by tradition from your ancestors;

General references

Luke 5:30
And the Pharisees and their scribes began complaining to his disciples, saying, "Why are you eating and drinking with tax-gatherers and sinners?"