Mark 7:3

(for the Pharisees and all the Jews, unless they wash their hands diligently, do not eat, holding what has been delivered by the ancients;

Mark 7:13

making void the word of God by your traditional teaching which ye have delivered; and many such like things ye do.

Galatians 1:14

and advanced in Judaism beyond many my contemporaries in my nation, being exceedingly zealous of the doctrines of my fathers.

Colossians 2:8

See that there be no one who shall lead you away as a prey through philosophy and vain deceit, according to the teaching of men, according to the elements of the world, and not according to Christ.

Matthew 15:2-6

Why do thy disciples transgress what has been delivered by the ancients? for they do not wash their hands when they eat bread.

Mark 7:5

then the Pharisees and the scribes ask him, Why do thy disciples not walk according to what has been delivered by the ancients, but eat the bread with defiled hands?

Mark 7:7-10

But in vain do they worship me, teaching as their teachings commandments of men.

Colossians 2:21-23

Do not handle, do not taste, do not touch,

1 Peter 1:18

knowing that ye have been redeemed, not by corruptible things, as silver or gold, from your vain conversation handed down from your fathers,

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, teaching as their teachings commandments of men.
Matthew 15:2
Why do thy disciples transgress what has been delivered by the ancients? for they do not wash their hands when they eat bread.
Galatians 1:14
and advanced in Judaism beyond many my contemporaries in my nation, being exceedingly zealous of the doctrines of my fathers.
Colossians 2:8
See that there be no one who shall lead you away as a prey through philosophy and vain deceit, according to the teaching of men, according to the elements of the world, and not according to Christ.
1 Peter 1:18
knowing that ye have been redeemed, not by corruptible things, as silver or gold, from your vain conversation handed down from your fathers,

General references

Luke 5:30
And their scribes and the Pharisees murmured at his disciples, saying, Why do ye eat and drink with tax-gatherers and sinners?