أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ سَعِيدٍ ، حَدَّثَنَا أَبُو أُسَامَةَ ، عَنْ الْأَعْمَشِ ، قَالَ : قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ :" آفَةُ الْعِلْمِ النِّسْيَانُ، وَإِضَاعَتُهُ أَنْ تُحَدِّثَ بِهِ غَيْرَ أَهْلِهِ "

Abdullah bin Saeed told us, Abu Usama told us, on the authority of Al-A’mash, he said: The Messenger of God, may God bless him and grant him peace, said: “The scourge of knowledge Forgetting, and wasting it by telling it to people other than those who deserve it.”