أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُبَارَكِ، حَدَّثَنَا الْوَلِيدُ، عَنْ الْأَوْزَاعِيِّ، عَنْ الزُّهْرِيِّ، قَالَ: "آفَةُ الْعِلْمِ النِّسْيَانُ، وَتَرْكُ الْمُذَاكَرَةِ".
It is narrated from Imam Awza'i (may Allah have mercy on him), Imam Zuhri (may Allah have mercy on him) said: The calamity of knowledge is forgetfulness and abandoning discussion.