Prayer Times
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 33
وَقَالَ سَمَاعَةُ بْنُ مِهْرَانَ: قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ فِي اَلْمَغْرِبِ إِنَّا رُبَّمَا صَلَّيْنَا وَ نَحْنُ نَخَافُ أَنْ تَكُونَ اَلشَّمْسُ خَلْفَ اَلْجَبَلِ أَوْ قَدْ سَتَرَنَا مِنْهَا اَلْجَبَلُ فَقَالَ لِي «لَيْسَ عَلَيْكَ صُعُودُ اَلْجَبَلِ.
Sama’a ibn Mehran said: "I asked Abu Abdullah عليه السلام about performing the Maghrib prayer, saying, 'Sometimes we pray, fearing that the sun might still be behind the mountain or that the mountain might be covering it from our view.' Imam عليه السلام said to me, 'You are not required to climb the mountain.'
- Ṣaḥīḥ al-Faqīh