Moses
Genesis 39:2ESV·traditional attribution

The LORD was with Joseph, and he became a successful man, and he was in the house of his Egyptian master.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. Joseph bought (Gen 39:1), and he that bought him, whatever he gave for him, had a good bargain of him; it was better than the merchandise of silver. The Jews have a proverb, "If the world did not know the worth of good men, they would hedge them about with pearls." He was sold to an officer of Pharaoh, with whom he...

Commenting on Genesis 39:1-6

John Gill Reformed Baptist @doctorgill

And the Lord was with Joseph,.... Blessing him with his gracious presence, with discoveries of his love, and communion with himself, though destitute of the means of grace and ordinances of worship he enjoyed in his father's house; favouring him with bodily health, and protecting him from all evils and enemies: and he was a prosperous man; in worldly things, and which was owing to...

Jamieson-Fausset-Brown Reformed @jfbcommentary

he was in the house of his master--Those slaves who had been war captives were generally sent to labor in the field and subjected to hard treatment under the "stick" of taskmasters. But those who were bought with money were employed in domestic purposes, were kindly treated, and enjoyed as much liberty as the same class does in modern Egypt.