Al-Kāfi
Hadith 4702ـ عَنْهُ عَنْ يَعْقُوبَ بْنِ يَزِيدَ عَنْ يَحْيَى بْنِ الْمُبَارَكِ عَنْ بُهْلُولِ بْنِ مُسْلِمٍ عَنْ حَفْصٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ مَنْ مَاتَ فِي أَقَلَّ مِنْ أَرْبَعَةَ عَشَرَ يَوْماً كَانَ مَوْتُهُ مَوْتَ فَجْأَةٍ.
2. It is narrated from the narrator of the above Hadith from Ya’qub ibn Yazid from Yahya ibn Mubarak from Buhlul ibn Muslim from Hafs who has said the following: “Abu ‘Abd Allah (a.s.), has said that if one dies from an illness within fourteen days, such death is a sudden death.”