Chapter on the Prayer Times (Mawaqit)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 13
أَحْمَدُ بْنُ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ سَيْفٍ عَنْ حَسَّانَ بْنِ مِهْرَانَ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنْ قَضَاءِ اَلنَّوَافِلِ قَالَ« مَا بَيْنَ طُلُوعِ اَلشَّمْسِ إِلَى غُرُوبِهَا»
Ahmad ibn Muhammad narrated from Ali ibn Sayf from Hassan ibn Mihran who said:
I asked Abu Abdillah عليه السلام, peace be upon him, about making up the supererogatory (nafila) prayers. Imam عليه السلام said: "Anytime between the rising of the sun and its setting."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 292
- Ṣaḥīḥ al-Tahdhīb, p. 164