He sent a man before them, even Joseph, who was sold for a servant:

He sent a man before them: Joseph was sold for a bondman.

He hath sent before them a man, For a servant hath Joseph been sold.

He sent a man before them, even Joseph, who was given as a servant for a price:

He sent a man before them This whole passage graphically teaches us, that whatever befell that people was by the hand and counsel of God. The simple recital would have been to say, that the famine came upon the land, after Joseph had been sold by his brethren, and carried into Egypt. But the prophet speaks emphatically, declaring that Joseph by the divine counsel had been sent before into Egypt, to support his father's house, that afterwards the famine was called, and that then, by God's providence, a remedy was presented beyond all hope. This, indeed, is generally true in human affairs; but there is here commemorated a special care which God took in governing and nourishing his Church. Moreover, the prophet mentions that as second in place which was first in the order of time. Accordingly, in regard to the word send, the pluperfect tense would better express the sense, he had sent; implying that before God afflicted the land of Canaan with famine, he had prepared a remedy for his servant Jacob, and for his household, in having sent Joseph before as a steward to provide them with food. Here two contraries as it were are stated, to render the divine superintendence in the whole the more conspicuous. How was Joseph sent of God? It was in this way:- When he was doomed to death, it happened that his brethren preferred selling him to leaving him in his grave. This selling, if considered merely by itself, like a cloud interposed, obscured and concealed the divine providence. When counsel was taken to put Joseph to death, who would have expected that he was to be the sustainer of his father's house? Afterwards a kind of death was devised for him less cruel; but then he was cast into a well or pit, and in that situation how could he succor others? The last hope was, that at length being sold, he came forth from the pit. But again, he was well nigh rotting all his life long in prison. Who could think that processes so intricate and circuitous were controlled by divine providence? The prophet therefore meets this difficulty by saying, that in respect of men, he was indeed sold; but that he had nevertheless been previously sent by the divine purpose. The passage is worthy of notice, admirably vindicating, as it does, the providence of God against the perverse stupidity of our corrupt nature. Resting on the second causes which meet the eye, or ascribing to the direction of man whatever is done in this world, or thinking that all things happen by chance, very few trace them to the appointment of God. And yet the selling of Joseph is not here interposed as a veil to hide divine providence; but is rather set forth as a signal instance of it to teach us that whatever men may undertake, the issues are in the hand of God; or rather, that by a secret influence, he bends the hearts of men in whatever direction he pleases, that by their instrumentality, whether they will or no, he may bring to pass what he has determined should be done. Agreeably to this Joseph said to his brethren, "Now, therefore, be not grieved nor angry with yourselves that ye sold me hither; for God did send me before you to preserve life," (Genesis 45:5) Farther, God so governs human affairs by his secret controlling influence, and overrules men's wicked devices to a right end, as that his judgments are notwithstanding uncontaminated by the depravity of men. The brethren of Joseph wickedly conspire his death; they also wrongfully sell him: the fault is in themselves. Contemplate now how God directs and controls all. By the hand of these brethren he provides for the good both of themselves and of their father Jacob, yea for that of the whole Church. This holy purpose contracts no defilement or spot from the malice of those who aimed at an entirely opposite end; even as Joseph testified afterwards, "But as for you, ye thought evil against me; but God meant it unto good, to bring to pass as it is this day, to save much people alive," (Genesis 1:20)

He sent a man before them - That is, He so ordered it by his providence that a man - Joseph - was sent before the family of Jacob into Egypt, that he might make arrangements for their reception and preservation. The whole matter was as God had sent him, or had commanded him to go. And yet it was brought about as the result of a series of acts of the most wicked character; by the envy and the hatred of his brethren; by their guilt and hardness of heart in proposing at first to put him to death, and then in their arrangements for selling him to hopeless slavery; by their plan so to dispose of him that their father might never hear of him again, and that they might be troubled with him no more. God did not cause these acts. He did not command them; he did not approve of them. And yet, since they did occur, and since Joseph's brethren were so wicked, God made use of these things to accomplish his own benevolent purposes, and to carry out his great designs. So he makes use of the passions of wicked people at all times to execute his plans (compare the notes at Isaiah 10:5-7; see also Psalm 76:10; and Genesis 50:20); and so he will do to the end of time. People are free in their wickedness; but God is equally free in frustrating their schemes, and overruling their designs for the accomplishment of his own purposes.
Who was sold for a servant - For a slave; Genesis 37:28, Genesis 37:36; Genesis 39:1.

He sent a man before them, even Joseph,.... Who, though but a lad of seventeen years of age when he was sold into Egypt, yet was a grown man when he stood before Pharaoh, and interpreted his dreams of plenty and famine to come; and advised him to lay up store in the years of plenty, against the years of famine; by which he appeared to be a wise man, as the Targum here calls him; see Genesis 37:3. Him God sent before into Egypt; before Jacob and his sons went down thither, to make provision for them, to support them in the time of famine, and preserve their lives. God is said to send him, though his brethren sold him out of envy; there being such a plain hand of Providence in this matter; and which is observed by Joseph himself over and over again, Genesis 45:5, in which he was a type of Christ, in whom all provisions are made, and by whom they are communicated unto his people; who all receive out of his fulness, and grace for grace.
Who was sold for a servant: either "to a servant": as to Potiphar, as Aben Ezra, who was a servant of Pharaoh's; or rather to be a servant, as Joseph was in his house: he was sold for twenty pieces of silver, as Christ, his antitype, for thirty; the price of a servant, Genesis 37:28, and who not only appeared in the form of a servant, but did the work of one: and a faithful and righteous servant he was to his Father, and on the behalf of his people.

Joseph was sent of God (Genesis 45:5).