Rashi, on Ps 14:4

“In his sight the malignant is brought to nothing: but he glorifieth them that fear the Lord. He that sweareth to his neighbour, and deceiveth not;”

“A base person is despised in his eyes One who is base with his wickedness is despised in the eyes of the righteous man, e.g. Hezekiah, who dragged his father’s remains in disgrace. he swears to hurt himself. and does not retract his oath. How much more does he not retract it if it concerns something that is not to his hurt!”

Imported from an open dataset — not yet checked against the printed edition.