Sunan Abi Dawud, Hadith 1052 ⓘ
Narrated Usamah ibn Umayr al-Huzali: The rain was falling on the day when the Battle of Hunayn took place. The Prophet, therefore, commanded that the people should offer their prayer in their camps.
حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ، أَخْبَرَنَا هَمَّامٌ، عَنْ قَتَادَةَ، عَنْ أَبِي الْمَلِيحِ، عَنْ أَبِيهِ، أَنَّ يَوْمَ، حُنَيْنٍ كَانَ يَوْمَ مَطَرٍ فَأَمَرَ النَّبِيُّ صلى الله عليه وسلم مُنَادِيَهُ أَنِ الصَّلاَةُ فِي الرِّحَالِ .
also referenced under: Hadith 1057 (DarusSalam) & Book 3, Hadith 1052 (USC-MSA)