Proverbs 10:18 (BSB)

The one who conceals hatred has lying lips, and whoever spreads slander is a fool.

From Proverbs 10. Also in the ESV.

Commentary on Proverbs 10:18

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 10:18: Observe here, Malice is folly and wickedness. 1. It is so when it is concealed by flattery and dissimulation: He is a fool, though he may think himself a politician, that hides hatred with lying lips, lest, if it break out, he should be ashamed before men and should lose the opportunity of gratifying his malice.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 10:18: He that hideth hatred with lying lips,.... Or he whose "lying lips hide hatred", which is much the same; who pretends to be a friend, and outwardly behaves as one, but inwardly nourishes and cherishes hatred in his heart, which he covers and conceals, till he has a proper opportunity of showing it; as Absalom to Ammon, Joab to Amasa, the men of Anathoth to...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Proverbs 10:18: Both vices must one day be known and punished, and hence their folly.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Proverbs 10:18: Pro 10:18 18 He that hideth hatred is a mouth of falsehood; And he that spreadeth slander is a fool. The lxx, καλύπτουσιν ἔχθραν χεῖλα δίκαια, which Ewald prefers, and which has given occasion to Hitzig to make a remarkable conjecture (“He who conceals hatred, close lips,” which no one understands without Hitzig’s comment. to this his conjecture). But (1) to hide hatred (cf.