Al-Kāfi - Volume 3 > The Times of Maghrib and ‘Isha’ Salah (Prayer)
Hadith #2

2ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ خَالِدٍ وَالْحُسَيْنِ بْنِ سَعِيدٍ عَنِ الْقَاسِمِ بْنِ عُرْوَةَ عَنْ بُرَيْدِ بْنِ مُعَاوِيَةَ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلام) قَالَ إِذَا غَابَتِ الْحُمْرَةُ مِنْ هَذَا الْجَانِبِ يَعْنِي مِنَ الْمَشْرِقِ فَقَدْ غَابَتِ الشَّمْسُ مِنْ شَرْقِ الأرْضِ وَغَرْبِهَا.

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn Khalid and al-Husayn ibn Sa‘id from al-Qasim ibn al-‘Urwah from Burayd ibn Mu‘awiyah who has said the following: “Abu Ja’far, ‘Alayhi al-Salam, ‘When the redness disappears from this side, that is, from the east, it is proof that it is sunset in the east and west.’”