Chapter on the Prayer Times (Mawaqit)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 13
عَنْهُ عَنْ صَفْوَانَ عَنْ مُعَلًّى أَبِي عُثْمَانَ عَنْ مُعَلَّى بْنِ خُنَيْسٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ:« آخِرُ وَقْتِ اَلْعَتَمَةِ نِصْفُ اَللَّيْلِ»
From him, from Safwan, from Mu'alla Abu Uthman, from Mu'alla ibn Khunays:
Abu Abdillah عليه السلام, peace be upon him, said: "The end of the time for the night prayer (Isha) is midnight."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 280
- Ṣaḥīḥ al-Tahdhīb