Psalm 5:9
"For there is no faithfulness in their mouth; their inward part is very wickedness; their throat is an open sepulchre; they flatter with their tongue."
Cross References (ranked by relevance)
Their throat is an open sepulchre; with their tongues they have used deceit; the poison of asps is under their lips:
They only consult to cast him down from his excellency: they delight in lies: they bless with their mouth, but they curse inwardly. Selah.
For the rich men thereof are full of violence, and the inhabitants thereof have spoken lies, and their tongue is deceitful in their mouth.
A man that flattereth his neighbour spreadeth a net for his feet.
Behold, thou desirest truth in the inward parts: and in the hidden part thou shalt make me to know wisdom.
Thy tongue deviseth mischiefs; like a sharp razor, working deceitfully.
Woe unto you, scribes and Pharisees, hypocrites! for ye are as graves which appear not, and the men that walk over them are not aware of them.
They search out iniquities; they accomplish a diligent search: both the inward thought of every one of them, and the heart, is deep.
The heart is deceitful above all things, and desperately wicked: who can know it?
O Jerusalem, wash thine heart from wickedness, that thou mayest be saved. How long shall thy vain thoughts lodge within thee?
Surely men of low degree are vanity, and men of high degree are a lie: to be laid in the balance, they are altogether lighter than vanity.
And the Lord said unto him, Now do ye Pharisees make clean the outside of the cup and the platter; but your inward part is full of ravening and wickedness.
For neither at any time used we flattering words, as ye know, nor a cloke of covetousness; God is witness: