Genesis 39:19

19. When his master heard the words of his wife. Seeing that a color so probable was given to the transaction, there is no wonder that jealousy, the motions of which are exceedingly vehement and ardent, should so far have prevailed with Potiphar, as to cause him to credit the calumnies of his wife. Yet the levity with which he instantly thrust a servant, whom he had found prudent and honest, into prison, without examining the cause, cannot be excused. He ought certainly to have been less under the influence of his wife. And, therefore, he received the just reward of his too easy folly, by cherishing with honor, a harlot in the place of a wife, and by almost performing the office of a pander. This example is useful to all; yet husbands especially are taught that they must use prudence, lest they should be carried rashly hither and thither, at the will of their wives. And, truly, since we everywhere see that they who are too obsequious to their wives are held up to ridicule; let us know that the folly of these men is condemned by the just judgment of God, so that we may learn to pray for the spirit of gravity and moderation. There is no doubt that Moses expressly condemns the rashness of Potiphar, in becoming inflamed against Joseph, as soon as he had heard his wife, and in giving the reins to his indignation, just as if the guilt of Joseph had been proved; for thus all equity is excluded, no just defense is allowed, and finally, the true and accurate investigation of the cause is utterly rejected. But it may be asked, How could the jealousy of Potiphar be excited, since Moses before has said that he was an eunuch? The solution of the question is easy; they were accustomed to be called eunuchs in the East, not only who were so really, but who were satraps and nobles. Wherefore, this name is of the same force as if Moses had said that he was one of the chief men of the court.