Leviticus 19,16

Thou shalt not be a detractor nor a whisperer among the people. Thou shalt not stand against the blood of thy neighbour. I am the Lord.

Psalms 34,14

Keep thy tongue form evil, and thy lips from speaking guile.

Psalms 52,4-7

All the day long thy tongue hath devised injustice: as a sharp razor, thou hast wrought deceit.

Thou hast loved malice more than goodness: and iniquity rather than to speak righteousness.

Thou hast loved all the words of ruin, O deceitful tongue.

Therefore will God destroy thee for ever: he will pluck thee out, and remove thee from thy dwelling place: and thy root out of the land of the living.

Proverbs 11,13

He that walketh deceitfully, revealeth secrets: but he that is faithful, concealeth the thing committed to him by his friend.

Proverbs 16,28

A perverse man stirreth up quarrels: and one full of words separateth princes.

Proverbs 18,8

The words of the double tongued are as if they were harmless: and they reach even to the inner parts of the bowels. Fear casteth down the slothful: and the souls of the effeminate shall be hungry.

Proverbs 20,19

Meddle not with him that revealeth secrets, and walketh deceitfully, and openeth wide his lips.

Proverbs 25,23

The north wind driveth away rain, as doth a sad countenance a backbiting tongue.

Proverbs 26,20

When the wood faileth, the fire shall go out: and when the talebearer is taken away, contentions shall cease.