The rain was falling on the day when the Battle of Hunayn took place. The Prophet ﷺ, therefore, commanded that the people should offer their prayer in their camps. (Using translation from Abū Dāʾūd 1057)   

فَأَمَرَ النَّبِيُّ ﷺ مُنَادِيَهُ أَنَّ الصَّلَاةَ فِي الرِّحَالِ  

[Machine] He witnessed the Messenger of Allah ﷺ in Hunayn on a rainy day. He ordered his caller to announce that prayer should be performed during travels.  

أَنَّهُ شَهِدَ رَسُولَ اللهِ ﷺ بِحُنَيْنٍ فِي يَوْمٍ مَطِيرٍ أَمَرَ مُنَادِيَهُ فَنَادِى إِنَّ الصَّلَاةَ فِي الرِّحَالِ  

[Machine] That the Prophet ﷺ commanded his caller on the day of Hunayn in a rainy day to announce the prayer in the camp.  

أَنَّ النَّبِيَّ ﷺ أَمَرَ مُنَادِيَهُ يَوْمَ حُنَيْنٍ فِي يَوْمٍ مَطِيرٍ فَنَادَى الصَّلَاةُ فِي الرِّحَالِ  

[Machine] The Prophet ﷺ commanded his caller to prayer, and he called out on a rainy day for performing the prayer under the tents.  

أَنَّ رَسُولَ اللهِ ﷺ أَمَرَ مُنَادِيَهُ فَنَادَى فِي يَوْمٍ مَطِيرٍ الصَّلَاةُ فِي الرِّحَالِ  

[Machine] We were hit by a rain in Hunayn, then a caller called out the Messenger of Allah ﷺ, "Pray while on the mounts."  

أَصَابَنَا مَطَرٍ بِحُنَيْنٍ فَنَادَى مُنَادِي رَسُولِ اللَّهِ ﷺ «أَنْ صَلُّوا فِي الرِّحَالِ»  

[Machine] We were with the Messenger of Allah ﷺ on a rainy day when he commanded a caller to announce, "Prayer is to be performed in travel."  

كُنَّا مَعَ رَسُولِ اللهِ ﷺ فِي يَوْمٍ مَطِيرٍ فَأَمَرَ مُنَادِيًا فَنَادَى «إِنَّ الصَّلَاةَ فِي الرِّحَالِ»  

[Machine] I witnessed the Messenger of Allah ﷺ on a rainy day, on a Friday. He commanded a caller who called out, "Pray in your garments."  

شَهِدْتُ رَسُولَ اللهِ ﷺ فِي يَوْمٍ مَطِيرٍ يَوْمَ جُمُعَةٍ أَمَرَ مُنَادِيًا فَنَادَى «أَنْ صَلُّوا فِي رِحَالِكُمْ»  

[Machine] The Messenger of Allah ﷺ ordered a caller who called out on a rainy day, "Pray in your tents."  

أَمَرَ رَسُولُ اللهِ ﷺ مُنَادِيًا فَنَادَى فِي يَوْمٍ مَطِيرٍ «صَلُّوا فِي رِحَالِكُمْ»