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 might get acquainted with public persons and public business, and so be fitted for the preferment for which he was designed. Note, 1. What God intends men for he will be sure, some way or other, to qualify them for. 2. Providence is to be acknowledged in the disposal even of poor servants and in their settlements, and therein may perhaps be working towards something great and important.
II. Joseph blessed, wonderfully blessed, even in the house of his servitude.
1. God prospered him, Gen 39:2, Gen 39:3. Perhaps the affairs of Potiphar's family had remarkably gone backward before; but, upon Joseph's coming into it, a discernible turn was given to them, and the face and posture of them altered on a sudden. Though, at first, we may suppose that his hand was put to the meanest services, even in those appeared his ingenuity and industry; a particular blessing of Heaven attended him, which, as he rose in his employment, became more and more discernible. Note, (1.) Those that have wisdom and grace have that which cannot be taken away from them, whatever else they are robbed of. Joseph's brethren had stripped him of his coat of many colours, but they could not strip him of his virtue and prudence. (2.) Those that can separate us from all our friends, yet cannot deprive us of the gracious presence of our God. When Joseph had none of all his relations with him, he had his God with him, even in the house of the Egyptian. Joseph was separated from his brethren, but not from his God; banished from his father's house, but the Lord was with him, and this comforted him. (3.) It is God's presence with us that makes all we do prosperous. Those that would prosper must therefore make God their friend; and those that do prosper must therefore give God the praise.
2. His master preferred him, by degrees made him steward of his household, Gen 39:4. Note, (1.) Industry and honesty are the surest and safest way both of rising and thriving: Seest thou a man prudent, and faithful, and diligent in his business? He shall stand before kings at length, and not always before mean men. (2.) It is the wisdom of those that are in any sort of authority to countenance and employ those with whom it appears that the presence of God is, Psa 101:6. Potiphar knew what he did when he put all into the hands of Joseph; for he knew it would prosper better there than in his own hand. (3.) He that is faithful in a few things stand fair for being made ruler over many things, Mat 25:21. Christ goes by this rule with his servants. (4.) It is a great ease to a master to have those employed under him that are trusty. Potiphar was so well satisfied with Joseph's conduct that he knew not aught he had, save the bread which he did eat, Gen 39:6. The servant had all the care and trouble of the estate; the master had only the enjoyment of it: an example not to be imitated by any master, unless he could be sure that he had one in all respects like Joseph for a servant.
3. God favoured his master for his sake (Gen 39:5): He blessed the Egyptian's house, though he was an Egyptian, a stranger to the true God, for Joseph's sake; and he himself, like Laban, soon learned it by experience, Gen 30:27. Note, (1.) Good men are the blessings of the places where they live; even good servants may be so, though mean, and lightly esteemed. (2.) The prosperity of the wicked is, one way or other, for the sake of the godly. Here was a wicked family blessed for the sake of one good servant in it.

An officer of Pharaoh, captain of the guard - Mr. Ainsworth, supposing that his office merely consisted in having charge of the king's prisoners, calls Potiphar provost marshal! See Clarke on Gen 37:36 (note), See Clarke on Gen 40:3 (note).

And Joseph was brought down to Egypt,.... By the Ishmaelites, Gen 37:28; as in a following clause:

and Potiphar an officer of Pharaoh, captain of the guard, an Egyptian; as his name also shows, which signifies the fruit of Pot or Phut, that is, the son or grandson of one of that name (m); which might be common in Egypt, since it was the name of a son of Ham, Gen 10:6, from whom the land of Egypt is called the land of Ham, Psa 105:23; of this man and his offices; see Gill on Gen 37:36,

he bought him: that is, "Joseph":

of the hands of the Ishmaelites, who had brought him down thither; what they gave for him we know, but what they sold him for to Potiphar is not said; no doubt they got a good price for him, and his master had a good bargain too, as appears by what follows.

(m) Onomastic. Sacr. p. 671, 672.