1 Peter 3:3-4

Your adornment ought not to be the outward adornment of plaited hair and golden jewels and the wearing of beautiful dresses;

2 Peter 2:22

In their case it has happened according to the true proverb, The dog returns again to his own vomit, and The sow, after washing, to her wallowing in the mire.

Treasury of Scripture Knowledge

Summary

As a jewel of gold in a swine's snout, so is a fair woman which is without discretion.

Bible References

A jewel

1 Peter 3:3
Your adornment ought not to be the outward adornment of plaited hair and golden jewels and the wearing of beautiful dresses;
2 Peter 2:22
In their case it has happened according to the true proverb, The dog returns again to his own vomit, and The sow, after washing, to her wallowing in the mire.