Full Sharh — Mishkat al-Masabih 262
وَعَنِ ابْنِ مَسْعُودٍ قَالَ: قَالَ لِي رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «تَعَلَّمُوا الْعِلْمَ وَعَلِّمُوهُ النَّاسَ تَعَلَّمُوا الْفَرَائِضَ وَعَلِّمُوهَا النَّاسَ تَعَلَّمُوا الْقُرْآنَ وَعَلِّمُوهُ النَّاسَ فَإِنِّي امْرُؤٌ مَقْبُوضٌ وَالْعِلْمُ سَيُقْبَضُ وَتَظْهَرُ الْفِتَنُ حَتَّى يَخْتَلِفَ اثْنَانِ فِي فَرِيضَةٍ لَا يَجِدَانِ أَحَدًا يَفْصِلُ بَيْنَهُمَا» . رَوَاهُ الدَّارِمِيُّ وَالدَّارَقُطْنِيّ
English Translation
Ibn Mas'ud reported that God's messenger said to him, "Acquire knowledge and teach it to the people, learn the obligatory duties and teach them to the people, learn the Qur’an and teach it to the people; for I am a man who will be taken away, knowledge will be taken away, dissensions will appear, so that two men will disagree about an obligatory duty and find no one to decide between them.” Darimi and Daraqutni transmitted it.
Source
Mishkat al-Masabih(مشكاة المصابيح)
Knowledge
Hadith Number
262