Mukhtasar Bukhari (Abridged) 86 — How knowledge will be lifted near

Narrated Abdullah bin Amr bin Al-As (may Allah be pleased with him): I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: "Allah does not take away knowledge by removing it from the hearts of the servants, but He takes away knowledge by taking away the scholars (through death), until when no scholar remains, people will take ignorant ones as their leaders (muftis and guides), and they will be asked (religious questions) and will give verdicts without knowledge; they will go astray themselves and will lead others astray."