Proverbs 10:12 - Ellicott's Commentary On The Whole Bible

Hatred stirreth up strifes... — Hatred rakes up again old feuds which have slumbered, but love covers up and refuses to look at any wrong done to it. A similar expression occurs in 1 Peter 4:8 and James 5:20, though probably in a somewhat different sense. (See the note on the former passage.)