James 3:6

3:6 And the tongue is a fire! The tongue represents the world of wrongdoing among the parts of our bodies. It pollutes the entire body and sets fire to the course of human existence – and is set on fire by hell.

Psalms 55:21

55:21 His words are as smooth as butter,

but he harbors animosity in his heart.

His words seem softer than oil,

but they are really like sharp swords.

Psalms 57:4

57:4 I am surrounded by lions;

I lie down among those who want to devour me;

men whose teeth are spears and arrows,

whose tongues are a sharp sword.

Psalms 59:7

59:7 Look, they hurl insults at me

and openly threaten to kill me,

for they say,

“Who hears?”

Psalms 64:3-4

64:3 They sharpen their tongues like a sword;

they aim their arrow, a slanderous charge,

64:4 in order to shoot down the innocent in secluded places.

They shoot at him suddenly and are unafraid of retaliation.