Yet did not the chief butler remember. This was the most severe trial of Joseph's patience, as we have before intimated. For since he had obtained an advocate who, without trouble, was able to extricate him from prison, especially as the opportunity of doing so had been granted to him by God, he felt a certain assurance of deliverance, and earnestly waited for it every hour. But when he had remained to the end of the second year in suspense, not only did this hope vanish, but greater despair than ever rested upon his mind. Therefore, we are all taught, in his person, that nothing is more improper, than to prescribe the time in which God shall help us; since he purposely, for a long season, keeps his own people in anxious suspense, that, by this very experiment, they may truly know what it is to trust in Him. Besides, in this manner he designed openly to claim for himself the glory of Joseph's liberation. For, if liberty had been granted to him through the entreaty of the butler, it would have been generally believed that this benefit was from man and not from God. Moreover, when Moses says, that the butler was forgetful of Joseph, let it be so understood, that he did not dare to make any mention of him, lest he should be subjected to reproach, or should be troublesome to the king himself. For it is common with courtiers perfidiously to betray the innocent, and to deliver them to be slain, rather than to offend those of whom they themselves are afraid.

Yet did not the chief butler remember Joseph - Had he mentioned the circumstance to Pharaoh, there is no doubt that Joseph's case would have been examined into, and he would in consequence have been restored to his liberty; but, owing to the ingratitude of the chief butler, he was left two years longer in prison.
Many commentators have seen in every circumstance in the history of Joseph a parallel between him and our blessed Lord. So, "Joseph in prison represents Christ in the custody of the Jews; the chief butler and the chief baker represent the two thieves which were crucified with our Lord; and as one thief was pardoned, and the other left to perish, so the chief butler was restored to his office, and the chief baker hanged." I believe God never designed such parallels; and I am astonished to find comparatively grave and judicious men trifling in this way, and forcing the features of truth into the most distorted anamorphosis, so that even her friends blush to acknowledge her. This is not a light matter; we should beware how we attribute designs to God that he never had, and employ the Holy Spirit in forming trifling and unimportant similitudes. Of plain, direct truth we shall find as much in the sacred writings as we can receive and comprehend; let us not therefore hew out unto ourselves broken cisterns that can hold no water. Interpretations of this kind only tend to render the sacred writings uncertain; to expose to ridicule all the solemn types and figures which it really contains; and to furnish pretexts to infidels and irreligious people to scoff at all spirituality, and lead them to reject the word of God entirely, as incapable of being interpreted on any fixed or rational plan. The mischief done by this system is really incalculable. See the observations on Genesis 37 (note).

Yet did not the chief butler remember Joseph,.... To speak of him to Pharaoh, neither on that day in which he was restored, nor for a long time after, even for the space of two years, as seems from the following chapter:
but forgot him; never more thought of him, of the favour he had done him in interpreting his dream; of the request he made to him, and of the promise which he had probably given him; which was an instance of great ingratitude, and is frequently the case and character of courtiers, who being in high places themselves, neglect others, their petitions to them, and their own promises to do all they can for them.

yet did not the chief butler remember Joseph--This was human nature. How prone are men to forget and neglect in prosperity, those who have been their companions in adversity (Amos 6:6)! But although reflecting no credit on the butler, it was wisely ordered in the providence of God that he should forget him. The divine purposes required that Joseph should obtain his deliverance in another way, and by other means.

But the former forgot Joseph in his prosperity, and did nothing to procure his liberation.