Psalms 64:3

64:3 They sharpen their tongues like a sword;

they aim their arrow, a slanderous charge,

Romans 3:14

3:14 “Their mouths are full of cursing and bitterness.”

Colossians 3:8

3:8 But now, put off all such things as anger, rage, malice, slander, abusive language from your mouth.

Colossians 3:19

3:19 Husbands, love your wives and do not be embittered against them.

James 3:14-15

3:14 But if you have bitter jealousy and selfishness in your hearts, do not boast and tell lies against the truth. 3:15 Such wisdom does not come from above but is earthly, natural, demonic.