Chapter on the Prayer Times (Mawaqit)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 13
عَنْهُ عَنْ جَعْفَرِ بْنِ سَمَاعَةَ عَنْ إِبْرَاهِيمَ بْنِ عَبْدِ اَلْحَمِيدِ عَنِ اَلصَّبَّاحِ بْنِ سَيَابَةَ وَ أَبِي أُسَامَةَ قَالاَ: سَأَلُوا اَلشَّيْخَ عَنِ اَلْمَغْرِبِ فَقَالَ بَعْضُهُمْ جَعَلَنِيَ اَللَّهُ فِدَاكَ نَنْتَظِرُ حَتَّى يَطْلُعَ كَوْكَبٌ« فَقَالَ خَطَّابِيَّةٌ إِنَّ جَبْرَئِيلَ عَلَيْهِ اَلسَّلاَمُ نَزَلَ بِهَا عَلَى مُحَمَّدٍ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ حِينَ سَقَطَ اَلْقُرْصُ»
From him, by Ja'far ibn Sama'ah, byIbrahim ibn Abdul Hamid, from Al-Sabbah ibn Sayabah and Abu Usamah:
They asked the Shaykh about Maghrib, and some of them said: “May I be your ransom, we wait until a star appears.” Imam عليه السلام said: “This is (the practice of) the Khattabiyyah. Indeed, Jibrail, peace be upon him, brought it (the timing of Maghrib) to Muhammad, may Allah سبحانه وتعالى bless him and his family, when the disk (of the sun) had set."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 275
- Ṣaḥīḥ al-Tahdhīb