EXTRA · Parashas Vayeishev · Passuk 39:3 · not a Torah Temimah citation on this passuk
And when his master saw that GOD was with him and that GOD lent success to everything he undertook,
Classical source (EXTRA side-ring): Bereshis Rabbah 86:4.
Sefaria — Bereshis Rabbah 86:4
English: “And his master saw that Hashem was with him” — whatever he did, the Holy One made successful in his hand.
Derash on the verse (Bereshis Rabbah) — not a formal named middah of the 13. Prosperity is read as evidence of Hashem’s presence.
Potiphar inferred Heaven’s favor from the consistent success of Yosef’s work.