Mishkat al-Masabih #197

‘Abdallah b. ‘Amr reported God’s messenger as saying, “God does not take away knowledge by removing it from men, but takes it away by taking away the learned, so that when He leaves no learned man, men will take ignorant men as leaders. Causes will be presented to them and they will pass judgement without knowledge, erring and leading others into error.” (Bukhari and Muslim.)