Authentic
graded by Al-Albani
Mishkat al-Masabih 245
Narrator:Abu ad-Dardā’
وَعَنْ أَبِي الدَّرْدَاءِ قَالَ: كُنَّا مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَشَخَصَ بِبَصَرِهِ إِلَى السَّمَاءِ ثُمَّ قَالَ: «هَذَا أَوَانٌ يُخْتَلَسُ فِيهِ الْعِلْمُ مِنَ النَّاسِ حَتَّى لَا يَقْدِرُوا مِنْهُ على شَيْء» . رَوَاهُ التِّرْمِذِيّ
Abu Darda’ told how God’s messenger, on an occasion when they were with him, turned his eyes to the sky and said, "This is a time when knowledge will be snatched away from men, so that they will be unable to acquire any.” Tirmidhi transmitted it.
Cited in Mishkat al-Masabih (No. 245).