His brethren refused compliance, and Joseph caused them to be put into prison by seventy of his valiant men, and there they remained for three days. God never allows the pious to languish in distress longer than three days, and so it was a Divine dispensation that the brethren of Joseph were released on the third day, and were permitted by Joseph to return home, on condition, however, that one of them remain behind as hostage.
The difference between Joseph and his brethren can be seen here. Though he retained one of them to be bound in the prison house, he still said, "I fear God," and dismissed the others, but when he was in their power, they gave no thought to God. At this time, to be sure, their conduct was such as is becoming to the pious, who accept their fate with calm resignation, and acknowledge the righteousness of God, for He metes out reward and punishment measure for measure. They recognized that their present punishment was in return for the heartless treatment they had dealt out to Joseph, paying no heed to his distress, though he fell at the feet of each of them, weeping, and entreating them not to sell him into slavery. Reuben reminded the others that they had two wrongs to expiate, the wrong against their brother and the wrong against their father, who was so grieved that he exclaimed, "I will go down to the grave to my son mourning."