Proverbs 20:28 in the World English Bible
Love and faithfulness keep the king safe. His throne is sustained by love.
Context
27 The spirit of man is the candle of the LORD, searching all the inward parts of the belly.
28 Mercy and truth preserve the king: and his throne is upholden by mercy.
29 The glory of young men is their strength: and the beauty of old men is the gray head.