Kommentar zu Bereschit 39:12

AND HE LEFT HIS GARMENT IN HER HAND. Out of respect for his mistress he did not wish to take the garment from her hand with his superior strength, and he removed it from upon himself, as it was a garment which one wears as a robe and headdress. But when she saw that he left his garment in her hands she feared lest he expose her to the people of the household or his master, and so she preceded him to them, saying that he had removed his garment to lie with her, but “when he saw that I screamed he fled in confusion.” This is the meaning of the verse, And it came to pass, when she saw that he had left his garment in her hand.²³¹Verse 13 here. This is also why she did not say, “And he left his garment in my hand,” but she instead told the men of her house and her husband, And he left his garment ‘etzli’ (with me).²³²The word etzli (with me) indicates that he himself had removed his garment, as explained above.

And fled. So that he would not be overcome by desire.

ותתפשהו בבגדו, She grabbed hold of his garment, etc. The Torah reveals Mrs Potiphar's intention when she grabbed Joseph's garment by stating לאמור. This word needs to be translated here: "as if to say." She did not say a word. Her actions spoke louder than any words.