Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tabarani:498ʿAlī b. ʿAbd al-ʿAzīz > Muslim b. Ibrāhīm > Saʿīd b. Zarbī > Abū al-Malīḥ al-Hudhalī from his father

[Machine] I accompanied the Messenger of Allah ﷺ and we went out to Hunayn on the seventeenth day of Ramadan. We coincided with a Friday, which was a rainy day. The Prophet ﷺ commanded Bilal to call out to the people, "Prayer is to be performed on the journeys."  

الطبراني:٤٩٨حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ الْعَزِيزِ ثنا مُسْلِمُ بْنُ إِبْرَاهِيمَ ثنا سَعِيدُ بْنُ زَرْبِيٍّ عَنْ أَبِي الْمَلِيحِ الْهُذَلِيِّ عَنْ أَبِيهِ قَالَ

غَزَوْتُ مَعَ رَسُولِ اللهِ ﷺ فَخَرَجْنَا إِلَى حُنَيْنٍ لِسَبْعَ عَشْرَةَ خَلَتْ مِنْ رَمَضَانَ فَوَافَقَنَا يَوْمُ جُمُعَةٍ يَوْمٌ مَطِيرٌ فَأَمَرَ النَّبِيُّ ﷺ بِلَالًا فَنَادَى فِي النَّاسِ «إِنَّ الصَّلَاةَ فِي الرِّحَالِ»