Al-Kāfi

Hadith 1622
3ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنْ يُونُسَ عَنْ إِبْرَاهِيمَ الْخَزَّازِ أَبِي أَيُّوبَ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ سَأَلْتُهُ عَنْ رَجُلٍ أُغْمِيَ عَلَيْهِ أَيَّاماً لَمْ يُصَلِّ ثُمَّ أَفَاقَ أَ يُصَلِّي مَا فَاتَهُ قَالَ لاَ شَيْ‏ءَ عَلَيْهِ.
3. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus from Ibrahim al-Khazzaz abu Ayyub who has said the following: “I once asked abu ‘Abd Allah (a.s.), about a man who remains fainted for several days, unable to perform any Salah (prayer), who then gains consciousness; if he is required, what is missed, to perform his Salah (prayer) again. He (the Imam) said, ‘He is not obligated to perform it again.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī