عَنْ قَابُوسٍ عَنْ أَبِيهِ عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: آخِرُ شِدَّةٍ يَلْقَاهَا الْمُؤْمِنُ الْمَوْتُ، وَفِي قَوْلِهِ: {يَوْمَ تَكُونُ السَّمَاءُ كَالْمُهْلِ} قَالَ: كَدُرْدِيِّ الزَّيْتِ، وَفِي قَوْلِهِ: {آَنَاءَ اللَّيْلِ} قَالَ: جَوْفُ اللَّيْلِ وَقَالَ: هَلْ تَدْرُونَ مَا ذَهَابُ الْعِلْمِ؟ قَالَ: هُوَ ذَهَابُ الْعُلَمَاءِ مِنَ الْأَرْضِ
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says: "The final hardship in which a believer is afflicted is death." In the statement of Allah Almighty «یَوْمَ تَکُوْنُ السَّمَاءُ کَالْمُہْلِ», "muhl" refers to the dregs of oil, and «آنَاءَ اللَّیْلِ» refers to the middle part of the night. Then he said: "Do you know what the ending of knowledge is? It is the removal of the people of knowledge from the earth."