Abu Huraira said, "I have kept in my memory two large quantities* of learning from God’s messenger, one of which I have disclosed among you; but were I to disclose the other, this <i>bul'um</i>, meaning the food tract, would be cut". Bukhari transmitted it. *Lit. receptacles, or vessels.

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: «حَفِظْتُ مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وِعَاءَيْنِ فَأَمَّا أَحَدُهُمَا فَبَثَثْتُهُ فِيكُمْ وَأَمَّا الْآخَرُ فَلَوْ بَثَثْتُهُ قُطِعَ هَذَا الْبُلْعُومُ يَعْنِي مجْرى الطَّعَام» رَوَاهُ البُخَارِيّ