וְשֵׁ֤ם הָאִישׁ֙ נָבָ֔ל וְשֵׁ֥ם אִשְׁתּ֖וֹ אֲבִגָ֑יִל וְהָאִשָּׁ֤ה טֽוֹבַת־שֶׂ֙כֶל֙ וִ֣יפַת תֹּ֔אַר וְהָאִ֥ישׁ קָשֶׁ֛ה וְרַ֥ע מַעֲלָלִ֖ים וְה֥וּא כלבו [כָלִבִּֽי׃]
那人名叫拿八，他的妻子名叫亞比該。這婦人聰明有見識，容貌又美麗；那男人卻為人苛刻，行事惡劣。他是迦勒家族的人。
Shenei Luchot HaBerit
ולא יכלו דברו לשלום . Rashi comments that we can learn the praiseworthy character traits of the brothers from the very criticism the Torah directs at them. The brothers were no hypocrites, fawning on Joseph to his face and cursing him behind his back. They were candid and frank. We have a parallel to this frankness in Samuel I 25,3, where Naval is described. Our sages say that he was just as evil as is implied by his very name [hardly a name given to him by his father at birth. Ed.], i.e. he did not bother to conceal his עין הרע, ill-will. The difference between Naval and the brothers was that whereas Naval was offensive to everybody, the brothers refrained from speaking to Joseph altogether. They did not want to be guilty of hypocrisy by speaking to him peacefully, hiding what was in their hearts; they also did not want to be guilty of hateful behavior towards him.