Jeremiah 9:8

Draw me not away with the wicked, and with the workers of iniquity, which speak peace to their neighbours, but mischief is in their hearts.

He that hateth dissembleth with his lips, and layeth up deceit within him; When he speaketh fair, believe him not: for there are seven abominations in his heart. Whose hatred is covered by deceit, his wickedness shall be shewed before the whole congregation.

And they bend their tongues like their bow for lies: but they are not valiant for the truth upon the earth; for they proceed from evil to evil, and they know not me, saith the Lord.

What shall be given unto thee? or what shall be done unto thee, thou false tongue?

And Joab said to Amasa, Art thou in health, my brother? And Joab took Amasa by the beard with the right hand to kiss him. But Amasa took no heed to the sword that was in Joab’s hand: so he smote him therewith in the fifth rib, and shed out his bowels to the ground, and struck him not again; and he died. So Joab and Abishai his brother pursued after Sheba the son of Bichri.

And when Abner was returned to Hebron, Joab took him aside in the gate to speak with him quietly, and smote him there under the fifth rib, that he died, for the blood of Asahel his brother.

They speak vanity every one with his neighbour: with flattering lips and with a double heart do they speak.

The words of his mouth were smoother than butter, but war was in his heart: his words were softer than oil, yet were they drawn swords.

My soul is among lions: and I lie even among them that are set on fire, even the sons of men, whose teeth are spears and arrows, and their tongue a sharp sword.

Who whet their tongue like a sword, and bend their bows to shoot their arrows, even bitter words: That they may shoot in secret at the perfect: suddenly do they shoot at him, and fear not.

For among my people are found wicked men: they lay wait, as he that setteth snares; they set a trap, they catch men.

And they will deceive every one his neighbour, and will not speak the truth: they have taught their tongue to speak lies, and weary themselves to commit iniquity.

Now he that betrayed him gave them a sign, saying, Whomsoever I shall kiss, that same is he: hold him fast. And forthwith he came to Jesus, and said, Hail, master; and kissed him.

So they shall make their own tongue to fall upon themselves: all that see them shall flee away.