[Machine] "Cry, for if you cannot find tears, pretend to cry. If you knew true knowledge, one of you would pray until their back is broken and cry until their voice is gone." This is a valid narration according to the conditions of the two Sheikhs (referring to Imam al-Bukhari and Muslim), but they did not include it in their compilations.
«ابْكُوا فَإِنْ لَمْ تَجِدُوا بُكَاءً فَتَبَاكَوْا لَوْ تَعْلَمُونَ الْعِلْمَ لَصَلَّى أَحَدُكُمْ حَتَّى يَنْكَسِرَ ظَهْرُهُ وَلَبَكَى حَتَّى يَنْقَطِعَ صَوْتُهُ» هَذَا إِسْنَادٌ صَحِيحٌ عَلَى شَرْطِ الشَّيْخَيْنِ وَلَمْ يُخْرِجَاهُ على شرط البخاري ومسلم