Chapter on the Prayer Times (Mawaqit)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 13
اَلْحُسَيْنُ بْنُ مُحَمَّدٍ عَنِ اَلْمُعَلَّى بْنِ مُحَمَّدٍ عَنِ اَلْوَشَّاءِ عَنْ أَبَانٍ عَنْ عَبْدِ اَلرَّحْمَنِ بْنِ أَبِي عَبْدِ اَللَّهِ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنْ رَجُلٍ نَسِيَ صَلاَةً حَتَّى دَخَلَ وَقْتُ صَلاَةٍ أُخْرَى فَقَالَ« إِذَا نَسِيَ اَلصَّلاَةَ أَوْ نَامَ عَنْهَا صَلَّى حِينَ يَذْكُرُهَا فَإِنْ ذَكَرَهَا وَهُوَ فِي صَلاَةٍ بَدَأَ بِالَّتِي نَسِيَ وَإِنْ ذَكَرَهَا وَهُوَ مَعَ إِمَامٍ فِي صَلاَةِ اَلْمَغْرِبِ أَتَمَّهَا بِرَكْعَةٍ ثُمَّ صَلَّى اَلْمَغْرِبَ ثُمَّ صَلَّى اَلْعَتَمَةَ بَعْدُ فَإِنْ كَانَ صَلَّى اَلْعَتَمَةَ وَحْدَهُ فَصَلَّى مِنْهَا رَكْعَتَيْنِ ثُمَّ ذَكَرَ أَنَّهُ نَسِيَ اَلْمَغْرِبَ أَتَمَّهَا بِرَكْعَةٍ فَتَكُونُ صَلاَةُ اَلْمَغْرِبِ ثَلاَثَ رَكَعَاتٍ ثُمَّ يُصَلِّي اَلْعَتَمَةَ بَعْدَ ذَلِكَ»
Al-Husayn ibn Muhammad narrated from Al-Mu'alla ibn Muhammad from Al-Washa' from Aban from Abd Al-Rahman ibn Abi Abdillah who said:
I asked Abu Abdillah عليه السلام, peace be upon him, about a man who forgot a prayer until the time of another prayer entered. Imam عليه السلام said: "If he forgets a prayer or sleeps through it, he should pray it as soon as he remembers it. If he remembers it while he is in the middle of another prayer, he should begin with the one he missed. And if he remembers it while he is with an Imam (of prayer) in the Maghrib prayer, he should complete it with a rak'ah and then pray Maghrib, and after that he should pray the Isha. If he had already prayed the Isha alone and had performed two rak'ahs of it and then remembered that he had forgotten Maghrib, he should complete it with a rak'ah so that it becomes the Maghrib prayer of three rak'ahs, and then he should pray the Isha after that."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 288
- Ṣaḥīḥ al-Tahdhīb