EXTRA · Parashas Vayeishev · Passuk 37:33 · not a Torah Temimah citation on this passuk
He recognized it, and said, “My son’s tunic! A savage beast devoured him! Joseph was torn by a beast!”
Classical source (EXTRA side-ring): Bereshis Rabbah 84:19.
Sefaria — Bereshis Rabbah 84:19
English: “An evil beast has devoured him” — a spark of the Divine Spirit flashed in him: which evil beast? The wife of Potiphar.
Derash on the verse (Bereshis Rabbah) — not a formal named middah of the 13. Mistaken eulogy is re-read as unwitting prophecy.
“Evil beast” is taken as an unintended prophecy of Potiphar’s wife, the true threat awaiting Yosef.