Narrated 'Abdullah bin 'Amr bin Al-'As:that the Messenger of Allah (ﷺ) said: "Indeed Allah does not take away knowledge by removing it from the people, but He takes away knowledge by taking the scholars, until there remains no scholar and the people begin to ask the ignorant leaders, so they give their verdict without knowledge. They will go astray and lead the people astray

English translation · Jami' at-Tirmidhi