אִ֣ישׁ תַּ֭הְפֻּכוֹת יְשַׁלַּ֣ח מָד֑וֹן וְ֝נִרְגָּ֗ן מַפְרִ֥יד אַלּֽוּף׃
L’homme artificieux déchaîne la discorde; le boutefeu sème la division entre amis.
Rashi on Proverbs
and a grumbler alienates the Lord And through his grumbling, he alienates the Lord of the world from himself.