Al-Amash reported God’s messenger as saying, “The calamity which affects knowledge is forgetfulness, and wasting it is to convey it to those who are unworthy of it.”
وَعَنِ الْأَعْمَشِ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «آفَةُ الْعِلْمِ النِّسْيَانُ وَإِضَاعَتُهُ أَنْ تُحَدِّثَ بِهِ غَيْرَ أَهْلِهِ»
Al-Amash reported God’s messenger as saying, “The calamity which affects knowledge is forgetfulness, and wasting it is to convey it to those who are unworthy of it.”
Who passed it on, from Al-Khatib at-Tibrizi back to the one who was there.
The same words, in another collection.
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