Psalm 55:21
His speech is smooth as butter, but war is in his heart. His words are softer than oil, yet they are swords unsheathed.

Proverbs 15:1
A gentle answer turns away wrath, but a harsh word stirs up anger.

Proverbs 18:23
The poor man pleads for mercy, but the rich man answers harshly.

Proverbs 25:15
Through patience a ruler can be persuaded, and a gentle tongue can break a bone.

Isaiah 30:10
They say to the seers, "No more visions, " and to the prophets, "Do not prophesy to us the truth. Speak to us pleasant words; prophesy illusions.