Genesis 39:3

3 And his master knew that the Lord was with him, and the Lord prospers in his hands whatsoever he happens to do.

Genesis 39:3 Meaning and Commentary

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.

Genesis 39:3 In-Context

1 And Joseph was brought down to Egypt; and Petephres the eunuch of Pharao, the captain of the guard, an Egyptian, bought him of the hands of the Ismaelites, who brought him down thither.
2 And the Lord was with Joseph, and he was a prosperous man; and he was in the house with his lord the Egyptian.
3 And his master knew that the Lord was with him, and the Lord prospers in his hands whatsoever he happens to do.
4 And Joseph found grace in the presence of his lord, and was well-pleasing to him; and he set him over his house, and all that he had he gave into the hand of Joseph.
5 And it came to pass after that he was set over his house, and over all that he had, that the Lord blessed the house of the Egyptian for Joseph's sake; and the blessing of the Lord was on all his possessions in the house, and in his field.

The Brenton translation of the Septuagint is in the public domain.