وَقَالَ لِلَّذِي ظَنَّ أَنَّهُ نَاجٍ مِّنْهُمَا اذْكُرْنِي عِندَ رَبِّكَ فَأَنسَاهُ الشَّيْطَانُ ذِكْرَ رَبِّهِ فَلَبِثَ فِي السِّجْنِ بِضْعَ سِنِينَ
[12:42]
And he said to him whom he knew would be delivered of the two: Remember me with your lord; but the Shaitan caused him to forget mentioning (it) to his lord, so he remained in the prison a few years.
And of the two, to that one whom he consider about to be saved, he said: "Mention me to thy lord." But Satan made him forget to mention him to his lord: and (Joseph) lingered in prison a few (more) years.
And he said unto him of the twain who he knew would be released: Mention me in the presence of thy lord. But Satan caused him to forget to mention it to his lord, so he (Joseph) stayed in prison for some years.