Surah 12. Yusuf, Ayah 42

 The King of Egypt.

Joseph never mentioned himself in interpreting the dream, nor ever thought of himself in his kindness to his fellow-sufferers in prison. It was afterwards, when the cup-bearer's dream came true, and he was being released on being restored to favour, that we can imagine him taking an affectionate leave of Joseph, and even asking him in his elation if he could do anything for Joseph. Joseph had no need of earthly favours,- least of all, from kings or their favourites. The divine grace was enough for him. But he had great work to do, which he could not do in prison-work for Egypt and her king, and the world at large. If the cup-bearer could mention him to the king, not by way of recommendation, but because the king's own justice was being violated in keeping an innocent man in prison, perhaps that might help to advance the cause of the king and of Egypt. And so he said, "Mention me to Pharaoh."

The eternal Plan does not put Allah's Prophets under obligations to men commanding mere worldly favour or earthly power. If they are given a chance, the obligation is on the worldly men, however highly placed...In this case, the poor cup-bearer was but human. When he was in the midst of the Court, he forgot the poor fellow-prisoner languishing in prison. In this he yielded to the lower part of his nature, which is guided by Satan.

A few (more) years: bidh' in Arabic signifies a small indefinite number, say up to 3, 5, 7 or 9 years.