Hadith 43190

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.

Source: Mishkat al-Masabih — repository translation · Al-Khatib Al-Tabrizi — authenticity/grade metadata requires independent source review · Sunnah.com
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Source: Mishkat al-Masabih — repository arabic · Al-Khatib Al-Tabrizi · Sunnah.com