Mark 7:3

for the pharisees, and indeed all the Jews, do not eat till they have washed their hands thoroughly, observing the tradition of the ancients.

Mark 7:13

making void the word of God by your tradition,. And many such like things ye do.

Galatians 1:14

and I made a proficiency in Judaism above many of the same age with me in my own nation, being excessively zealous for the traditions of my fathers.

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:

Matthew 15:2-6

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

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?

Mark 7:7-10

and in vain do they worship me, teaching for doctrines the injunctions of men.

Colossians 2:21-23

(such as "touch not, taste not,

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

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
and in vain do they worship me, teaching for doctrines the injunctions of men.
Matthew 15:2
Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat.
Galatians 1:14
and I made a proficiency in Judaism above many of the same age with me in my own nation, being excessively zealous for the traditions of my fathers.
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

Luke 5:30
And their scribes and pharisees murmured at his disciples, saying, Why do ye eat and drink with publicans and sinners?