Chapter on the Prayer Times (Mawaqit)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 13
سَهْلُ بْنُ زِيَادٍ عَنْ إِسْمَاعِيلَ بْنِ مِهْرَانَ قَالَ: كَتَبْتُ إِلَى اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ ذَكَرَ أَصْحَابُنَا أَنَّهُ إِذَا زَالَتِ اَلشَّمْسُ فَقَدْ دَخَلَ وَقْتُ اَلظُّهْرِ وَ اَلْعَصْرِ وَ إِذَا غَرَبَتْ دَخَلَ وَقْتُ اَلْمَغْرِبِ وَ اَلْعِشَاءِ اَلْآخِرَةِ إِلاَّ أَنَّ هَذِهِ قَبْلَ هَذِهِ فِي اَلسَّفَرِ وَ اَلْحَضَرِ وَ أَنَّ وَقْتَ اَلْمَغْرِبِ إِلَى رُبُعِ اَللَّيْلِ فَكَتَبَ عَلَيْهِ اَلسَّلاَمُ« كَذَلِكَ اَلْوَقْتُ غَيْرَ أَنَّ وَقْتَ اَلْمَغْرِبِ ضَيِّقٌ وَ آخِرَ وَقْتِهَا ذَهَابُ اَلْحُمْرَةِ وَ مَصِيرُهَا إِلَى اَلْبَيَاضِ فِي أُفُقِ اَلْمَغْرِبِ»
Sahl ibn Ziyad narrated from Isma'il ibn Mihran who said:
I wrote to (Imam) Al-Ridha عليه السلام, peace be upon him, mentioning that: “Our companions say that when the sun passes the meridian, the time for Dhuhr and Asr has entered, and when it sets, the time for Maghrib and Isha enters, except that Maghrib is before Isha, whether in travel or residence, and that the time for Maghrib extends until a quarter of the night.” So Imam عليه السلام, peace be upon him, wrote: "Such is the time, except that the time for Maghrib is narrow, and its end is when the redness disappears and it turns into whiteness in the western horizon."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 279
- Ṣaḥīḥ al-Tahdhīb