Matthew Henry on Genesis 42:7-20
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…
Read the whole note in the consoleJamieson-Fausset-Brown on Genesis 42:9
Ye are spies--This is a suspicion entertained regarding strangers in all Eastern countries down to the present day. Joseph, however, who was well aware that his brethren were not spies, has been charged with cruel dissimulation, with a deliberate violation of what he knew to be the truth, in imputing to them such a character. But it must be remembered that he was sustaining the part of a ruler; and, in fact, acting on the very principle sanctioned by many of the sacred writers, and our Lord Himself, who spoke parables (fictitious stories) to promote a good end.
Adam Clarke on Genesis 42:13
One is not - An elliptical sentence, One is not alive.
John Gill on Genesis 42:14
And Joseph said unto them, that is it that I spake unto you, saying, ye are spies. This proves it, at least gives strong suspicion of it; since at first they seemed to speak of themselves, as if they were the only sons of one man and there were no more, now they speak of twelve, and make mention of one being at home with his father; but seeing he sent so many of them, why not all? why should one only be left at home?
John Calvin