Job 20:12
"Though wickedness be sweet in his mouth, though he hide it under his tongue;"
Cross References (ranked by relevance)
His mouth is full of cursing and deceit and fraud: under his tongue is mischief and vanity.
How much more abominable and filthy is man, which drinketh iniquity like water?
Rejoice, O young man, in thy youth; and let thy heart cheer thee in the days of thy youth, and walk in the ways of thine heart, and in the sight of thine eyes: but know thou, that for all these things God will bring thee into judgment.
Bread of deceit is sweet to a man; but afterwards his mouth shall be filled with gravel.
And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat.