Making up the Night Prayer
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 76
وَ رَوَى بُرَيْدُ بْنُ مُعَاوِيَةَ اَلْعِجْلِيُّ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ أَنَّهُ قَالَ: «أَفْضَلُ قَضَاءِ صَلاَةِ اَللَّيْلِ فِي اَلسَّاعَةِ اَلَّتِي فَاتَتْكَ آخِرِ اَللَّيْلِ وَ لَيْسَ بَأْسٌ أَنْ تَقْضِيَهَا بِالنَّهَارِ وَ قَبْلَ أَنْ تَزُولَ اَلشَّمْسُ.
Burayd ibn Mu'awiyah al-'Ijli narrated from Imam Muhammad ibn Ali Al-Baqir عليه السلام that He said: "The best time to make up the missed night prayers is at the same hour during the following night when it was missed. However, it is permissible to make them up during the day, even before the sun's decline (before noon)."
- Ṣaḥīḥ al-Faqīh, p. 70