EXTRA · Parashas Vayeishev · Passuk 37:4 · not a Torah Temimah citation on this passuk
And when his brothers saw that their father loved him more than any of his brothers, they hated him so that they could not speak a friendly word to him.
Classical source (EXTRA side-ring): Bereshis Rabbah 84:9.
Sefaria — Bereshis Rabbah 84:9
English: “And his brothers saw that their father loved him more than all his brothers” — R’ Ahava bar Ze’eira said: From the tribes’ own fault you learn their praise.
Derash on the verse (Bereshis Rabbah) — not a formal named middah of the 13. Narrative blame is reread as evidence of character.
The Torah’s frank record of the brothers’ hatred is itself testimony to their honesty: their flaw is not hidden.