Adam Clarke on Genesis 41:9

I do remember my faults - It is not possible he could have forgotten the circumstance to which he here alludes; it was too intimately connected with all that was dear to him, to permit him ever to forget it. But it was not convenient for him to remember this before; and probably he would not have remembered it now, had he not seen, that giving this information in such a case was likely to serve his own interest. We are justified in thinking evil of this man because of his scandalous neglect of a person who foretold the rescue of his life from imminent destruction, and who, being unjustly confined, prayed to have his case fairly represented to the king that justice might be done him; but this courtier, though then in the same circumstances himself, found it convenient to forget the poor, friendless Hebrew slave!