מִ֭רְמָה בְּלֶב־חֹ֣רְשֵׁי רָ֑ע וּֽלְיֹעֲצֵ֖י שָׁל֣וֹם שִׂמְחָֽה׃
악을 꾀하는 자의 마음에는 궤휼이 있고 화평을 논하는 자에게는 희락이 있느니라
Malbim
5. A man can be destroyed by family dissension, as when brothers bear malice towards one another and fabricate hatred (Proverbs 12:20) in his house. This is what the enmity between Joseph and his brothers did to the patriarch Jacob. But Job's family lived in harmony and affection: [His sons held regular feasts etc.]