Chapter on the Prayer Times (Mawaqit)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 13
سَهْلُ بْنُ زِيَادٍ عَنْ عَلِيِّ بْنِ اَلرَّيَّانِ قَالَ: كَتَبْتُ إِلَيْهِ اَلرَّجُلُ يَكُونُ فِي اَلدَّارِ تَمْنَعُهُ حِيطَانُهَا اَلنَّظَرَ إِلَى حُمْرَةِ اَلْمَغْرِبِ وَ مَعْرِفَةَ مَغِيبِ اَلشَّفَقِ وَ وَقْتِ صَلاَةِ اَلْعِشَاءِ اَلْآخِرَةِ مَتَى يُصَلِّيهَا وَ كَيْفَ يَصْنَعُ فَوَقَّعَ عَلَيْهِ اَلسَّلاَمُ« يُصَلِّيهَا إِذَا كَانَ عَلَى هَذِهِ اَلصِّفَةِ عِنْدَ قَصْرِ اَلنُّجُومِ وَ اَلْعِشَاءَ عِنْدَ اِشْتِبَاكِهَا وَ بَيَاضِ مَغِيبِ اَلشَّمْسِ»
Sahl ibn Ziyad narrated from Ali ibn Al-Rayan who said:
I wrote to Imam عليه السلام, asking; “About a man who is inside a house, and its walls prevent him from seeing the redness of the Maghrib and from knowing the disappearance of the twilight and the time for the Isha prayer; when should he pray it, and what should he do?” So Imam عليه السلام, peace be upon him, wrote in response: "He should pray it, in this case, when the stars begin to scatter and Isha when they become intertwined and the whiteness of the sunset appears."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 279
- Ṣaḥīḥ al-Tahdhīb