Proverbs 26:25
When he says fair words, have no belief in him; for in his heart are seven evils:
Psalm 28:3
Do not take me away with the sinners and the workers of evil, who say words of peace to their neighbours, but evil is in their hearts.
Psalm 12:2
Everyone says false words to his neighbour: their tongues are smooth in their talk, and their hearts are full of deceit.
Proverbs 6:16-19
Six things are hated by the Lord; seven things are disgusting to him:
Jeremiah 9:2-8
If only I had in the waste land a night's resting-place for travellers, so that I might go away, far from my people! for they are all untrue, a band of false men.
Jeremiah 12:6
For even your brothers, your father's family, even they have been untrue to you, crying loudly after you: have no faith in them, though they say fair words to you.
Micah 7:5
Put no faith in a friend, do not let your hope be placed in a relation: keep watch on the doors of your mouth against her who is resting on your breast.
Matthew 24:23
Then if any man says to you, See, here is the Christ, or, Here; do not put faith in him;