Job 20:12

If evil shall be sweet in his mouth he will cover it under his tongue;

Job 15:16

How much more abominable and corrupt is man drinking iniquity as water!

Psalm 10:7

His mouth was filled with cursing and deceit and violence: under his tongue, trouble and vanity.

Genesis 3:6

And the woman will see that the tree is good for food, and that it is a desire to the eyes, and a tree desired to make wise; and she will take from its fruit and will eat, and will give also to her man with her, and he will eat

Psalm 109:17-18

And he will love cursing, and it shall come to him: and he delighted not in praise, and it shall be far from him.

Proverbs 9:17-18

Stolen waters will be sweet, and the bread of secrets shall be pleasant

Proverbs 20:17

Bread of falsehood is sweet to a man; and afterward his mouth shall be filled with gravel

Ecclesiastes 11:9

Rejoice, O young man, in thy youth; and thy heart shall do thee good in the days of thy youth, and go in the ways of thy heart, and in the sight of thine eyes: and know thou, that for all these God will bring thee into judgment

Treasury of Scripture Knowledge

Summary

Though wickedness be sweet in his mouth, though he hide it under his tongue;

Bible References

Wickedness

Job 15:16
How much more abominable and corrupt is man drinking iniquity as water!
Genesis 3:6
And the woman will see that the tree is good for food, and that it is a desire to the eyes, and a tree desired to make wise; and she will take from its fruit and will eat, and will give also to her man with her, and he will eat
Proverbs 9:17
Stolen waters will be sweet, and the bread of secrets shall be pleasant
Proverbs 20:17
Bread of falsehood is sweet to a man; and afterward his mouth shall be filled with gravel
Ecclesiastes 11:9
Rejoice, O young man, in thy youth; and thy heart shall do thee good in the days of thy youth, and go in the ways of thy heart, and in the sight of thine eyes: and know thou, that for all these God will bring thee into judgment

He hide

Psalm 10:7
His mouth was filled with cursing and deceit and violence: under his tongue, trouble and vanity.
Psalm 109:17
And he will love cursing, and it shall come to him: and he delighted not in praise, and it shall be far from him.