(18) باب وَقْتِ الْمَغْرِبِ
Narrated Salama:
We used to pray the Maghrib prayer with the Prophet (ﷺ) when the sun disappeared from the horizon.
Reference: Sahih al-Bukhari 561
In-book reference: Book 9, Hadith 38
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 10, Hadith 536