Rashi on TanakhGenesis 39

Yoseif was brought down. [Scripture now] returns to the earlier narrative, but only interrupted it to relate Yehudah’s descent [from power] to the selling of Yoseif, in order to indicate that it was because of him [Yoseif] that they demoted him [Yehudah] from his high position. Also, in order to relate the narrative of Potiphar’s wife to the narrative of Tamar, in order to indicate to you that just as this one [Tamar acted] with pure motives so, too, the other one [Potiphar’s wife] acted with pure motives. She had seen in her astrological signs that she was destined to have children [descended] from him, but she did not know whether it would be from her or whether from her daughter.

That Adonoy was with him. He would constantly mention the Name of God.

All [that] he possessed. This is an abbreviated expression, omitting the word אֲשֶׁר —that.

He did not concern himself with anything about him. [Meaning:] he paid no attention to anything.

Except for the bread. A reference to his wife, but expressed euphemistically.

Yoseif was well-built. Once he perceived himself as a ruler he began to eat, drink and curl his hair. God said: “Your father is in mourning and you curl your hair! I will provoke the bear against you.” Immediately:

His master’s wife cast her eyes, etc. Whenever אַחַר is used it means immediately after.

And sin against God. The descendants of Noach were commanded [to observe] the laws of chastity.

To lie next to her. Even without intimacy.

To be with her. In the World-to-Come [in Gehinnom].

It was on such a day. Meaning: it was when a special day arrived— a day of merriment, a day of their idolatrous feasts, when they all went to their temples— that she said, “I have no day as suitable to seduce Yoseif, as this day.” She [therefore] told them, “I am ill and cannot go [to the temple].”

To do his work. Rav and Shmuel [dispute what this means]: One says, [it means] literally, his work, and the other says he intended to have his way with her, but, his father’s image appeared to him, etc., as is stated in Maseches Sotah.

See he brought us. This is an abbreviated statement. “He brought us,” but it is not made clear who brought him. [Actually,] she was referring to her husband.

Hebrew. One who comes from the other side of the river. [Also,] one who is a descendant of Eiver.

His master. [The master] of Yoseif.

Came to me. In order to mock me, [so did] the Hebrew slave that you brought to us.

When his master heard, etc. She told him this when they were intimate. This is what she said: “These are the things that your slave did to me.” [I.e.,] intimate things such as these.

Granting him favor. So that he was liked by all who saw him, having the same meaning as: “A beautiful bride and well-liked” [that is found] in the Mishnah.

He was the one who did it. As Onkelos translates it: It was done at his command.

Because Adonoy was with him. [בַּאֲשֶׁר means] because God was with him.