Prayer (Kitab Al-Salat)
2/10. Chapter:
The Time For Maghrib
Sunan Abi Dawud
حَدَّثَنَا عَمْرُو بْنُ عَلِيٍّ، عَنْ صَفْوَانَ بْنِ عِيسَى، عَنْ يَزِيدَ بْنِ أَبِي عُبَيْدٍ، عَنْ سَلَمَةَ بْنِ الأَكْوَعِ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي الْمَغْرِبَ سَاعَةَ تَغْرُبُ الشَّمْسُ إِذَا غَابَ حَاجِبُهَا .
Salamah b. al-Akwa' said: The Prophet (ﷺ) used to say the Maghrib prayer immediately after the sun had set when its upper side would disappear.
Reference : Sunan Abi Dawud 417In-book reference : Book 2, Hadith 27English translation : Book 2, Hadith 417