Al-Kāfi - Volume 3 > One Who Goes to Sleep Before Performing Salah (Prayer) or Forgets
Hadith #10

10ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادٍ عَنْ حَرِيزٍ عَنْ زُرَارَةَ وَالْفُضَيْلِ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلام) فِي قَوْلِ الله تَبَارَكَ اسْمُهُ إِنَّ الصَّلاةَ كانَتْ عَلَى الْمُؤْمِنِينَ كِتاباً مَوْقُوتاً قَالَ يَعْنِي مَفْرُوضاً وَلَيْسَ يَعْنِي وَقْتَ فَوْتِهَا إِذَا جَازَ ذَلِكَ الْوَقْتُ ثُمَّ صَلاَّهَا لَمْ تَكُنْ صَلاَتُهُ هَذِهِ مُؤَدَّاةً وَلَوْ كَانَ ذَلِكَ لَهَلَكَ سُلَيْمَانُ بْنُ دَاوُدَ (عَلَيْهِما الْسَّلام) حِينَ صَلاَّهَا لِغَيْرِ وَقْتِهَا وَلَكِنَّهُ مَتَى مَا ذَكَرَهَا صَلاَّهَا قَالَ ثُمَّ قَالَ وَمَتَى اسْتَيْقَنْتَ أَوْ شَكَكْتَ فِي وَقْتِهَا أَنَّكَ لَمْ تُصَلِّهَا أَوْ فِي وَقْتِ فَوْتِهَا أَنَّكَ لَمْ تُصَلِّهَا صَلَّيْتَهَا فَإِنْ شَكَكْتَ بَعْدَ مَا خَرَجَ وَقْتُ الْفَوْتِ فَقَدْ دَخَلَ حَائِلٌ فَلاَ إِعَادَةَ عَلَيْكَ مِنْ شَكٍّ حَتَّى تَسْتَيْقِنَ فَإِنِ اسْتَيْقَنْتَ فَعَلَيْكَ أَنْ تُصَلِّيَهَا فِي أَيِّ حَالٍ كُنْتَ.

10. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from Hammad from Hariz from Zurarah and Fudayl who has said the following: “This is about the words of Allah, most Blessed is whose name, ‘Salah (prayer) was written as obligatory upon people.’ (4:103) Abu Ja’far, ‘Alayhi al-Salam, has said, ‘It means that it was obligatory, not that it is obligatory for a limited time so that if it is performed after the limited time, it does not fulfill the obligation. Had it been so Sulayman son of Dawud would have been destroyed when he performed his Salah (prayer) in a time, which was other than the time of that Salah (prayer). However, he performed when he remembered.’ He (the Imam) then said, ‘If you are certain or have doubts in its time that you did not perform, you must perform it again. If you face a doubt after its time has ended, there has an obstacle come into existence, so a repeat is not required from you because of doubt, unless you are certain. If you become certain you must perform in whatever condition you are.’”