Genesis 39:3

And his master saw that the Lord [was] with him,.... He knew nothing of the spiritual and gracious presence of God that was with him, he was no judge of that; but he perceived by the ingenuity of his mind, by his ready and speedy learning the Egyptian language, by his dexterity in business, and by the prudence and faithfulness with which he did everything, that he was highly favoured by the divine Being, and had great endowments bestowed upon him, and was an extraordinary person for his age:

and that the Lord made all that he did to prosper in his hand; and though Potiphar might have no knowledge of the true Jehovah, whose name he uses, yet he might have a notion of a supreme Being, and that all outward prosperity was owing to him; and knowing Joseph to be an Hebrew, as it is plain his wife did, Genesis 39:14; and Jehovah to be the God of the Hebrews, he imputes all the prosperity that attended Joseph and his services unto his God.