We may well wonder that Joseph, during the twenty years that he had now been in Egypt, especially during the last seven years that he had been in power there, never sent to his father to acquaint him with his circumstances; nay, it is strange that he who so often went throughout all the land of Egypt (Gen 41:45, Gen 41:46) never made an excursion to Canaan, to visit his aged father, when he was in the borders of Egypt, that lay next to Canaan. Perhaps it would not have been above three or four days' journey for him in his chariot. It is a probable conjecture that his whole management of himself in this affair was by special direction from Heaven, that the purpose of God concerning Jacob and his family might be accomplished. When Joseph's brethren came, he knew them by many a satisfactory token, but they knew not him, little thinking to find him there, Gen 42:8. He remembered the dreams (Gen 42:9), but they had forgotten them. The laying up of God's oracles in our hearts will be of excellent use to us in all our conduct. Joseph had an eye to his dreams, which he knew to be divine, in his carriage towards his brethren, and aimed at the accomplishment of them and the bringing of his brethren to repentance for their former sins; and both these points were gained.
I. He showed himself very rigorous and harsh with them. The very manner of his speaking, considering the post he was in, was enough to frighten them; for he spoke roughly to them, Gen 42:7. He charged them with bad designs against the government (Gen 42:9), treated them as dangerous persons, saying, You are spies, and protesting by the life of Pharaoh that they were so, Gen 42:16. Some make this an oath, others make it no more than a vehement asseveration, like that, as thy soul liveth; however it was more than yea, yea, and nay, nay, and therefore came of evil. Note, Bad words are soon learned by converse with those that use them, but not so soon unlearned. Joseph, by being much at court, got the courtier's oath, By the life of Pharaoh, perhaps designing hereby to confirm his brethren in their belief that he was an Egyptian, and not an Israelite. They knew this was not the language of a son of Abraham. When Peter would prove himself no disciple of Christ, he cursed and swore. Now why was Joseph thus hard upon his brethren? We may be sure it was not from a spirit of revenge, that he might now trample upon those who had formerly trampled upon him; he was not a man of that temper. But, 1. It was to enrich his own dreams, and complete the accomplishment of them. 2. It was to bring them to repentance. 3. It was to get out of them an account of the state of their family, which he longed to know: they would have discovered him if he had asked as a friend, therefore he asks as a judge. Not seeing his brother Benjamin with them, perhaps he began to suspect that they had made away with him too, and therefore gives them occasion to speak of their father and brother. Note, God in his providence sometimes seems harsh with those he loves, and speaks roughly to those for whom yet he has great mercy in store.
II. They, hereupon, were very submissive. They spoke to him with all the respect imaginable: Nay, my lord (Gen 42:10) - a great change since they said, Behold, this dreamer comes. They very modestly deny the charge: We are no spies. They tell him their business, that they came to buy food, a justifiable errand, and the same that many strangers came to Egypt upon at this time. They undertake to give a particular account of themselves and their family (Gen 42:13), and this was what they wanted.
III. He clapped them all up in prison for three days, Gen 42:17. Thus God deals with the souls he designs for special comfort and honour; he first humbles them, and terrifies them, and brings them under a spirit of bondage, and then binds up their wounds by the Spirit of adoption.
IV. He concluded with them, at last, that one of them should be left as a hostage, and the rest should go home and fetch Benjamin. It was a very encouraging word he said to them (Gen 42:18): I fear God; as if he had said, "You may assure yourselves I will do you no wrong; I dare not, for I know that, high as I am, there is one higher than I." Note, With those that fear God we have reason to expect fair dealing. The fear of God will be a check upon those that are in power, to restrain them from abusing their power to oppression and tyranny. Those that have no one else to stand in awe of ought to stand in awe of their own consciences. See Neh 5:15, So did not I, because of the fear of God.

I fear God - את האלהים אני ירא eth haelohim ani yare, literally translated the passage runs thus, I also fear the gods; but the emphatic ה ha is probably added by Joseph, both here and in his conversation with Pharaoh, the more particularly to point out the eminence and perfection of the Supreme Being as contradistinguished from the gods of Egypt. He seems to say to his brethren, I am a worshipper of the true God, and ye have nothing to fear.

And Reuben answered them,.... Being the eldest, and who had been most concerned for the life of Joseph, and most tender and careful of him:

saying, spake I not unto you, saying, do not sin against the child,

and ye would not hear? it seems by this that Reuben endeavoured to dissuade his brethren from selling Joseph, when they first proposed it, to which they would not attend; since it is certain they did hearken to him as not to kill him directly, as they first consulted, and they hearkened to him to cast him into a pit, where he did not intend he should continue, but till he had an opportunity of taking him out, and returning him to his father: but it seems probable that Reuben was with them when they first spied the Ishmaelites, and proposed to sell Joseph to them, which he objected to, and entreated they would not do it; and perhaps he went out from them, and took a circuit, with a view to get to the pit and take Joseph out, but before he got thither his brethren had taken him out, and sold him: or this may refer to the general advice he always gave them, to do nothing that might endanger the life of Joseph, or be the means of his death, which selling him for a slave he supposed had been:

therefore, behold, also, his blood is required; the Targum of Jonathan adds, "of us"; they were accessary to his death, and guilty of it; for Reuben supposed he was dead, and now they must suffer for it, as a just retaliation, being threatened with death unless they could clear themselves.

put them . . . into ward three days--Their confinement had been designed to bring them to salutary reflection. And this object was attained, for they looked upon the retributive justice of God as now pursuing them in that foreign land. The drift of their conversation is one of the most striking instances on record of the power of conscience [Gen 42:21-22].