(Imām Bukhārī narrates): Adam narrated the hadith to us, he said: Ibn Abi Dhi'b narrated the hadith to us, from az-Zuhri, from Abbad bin Tamim, from his uncle, he narrates:
I saw one day that the Prophet ﷺ went out to seek rain, he ﷺ turned his back towards the people and began to supplicate facing towards the Qiblah, then he ﷺ turned his cloak around, then he ﷺ led us in two rak'ahs of prayer in which he recited in a loud voice.
حَدَّثَنَا آدَمُ قَالَ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ عَنْ الزُّهْرِيِّ عَنْ عَبَّادِ بْنِ تَمِيمٍ عَنْ عَمِّهِ قَالَ رَأَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَوْمَ خَرَجَ يَسْتَسْقِي قَالَ فَحَوَّلَ إِلَى النَّاسِ ظَهْرَهُ وَاسْتَقْبَلَ الْقِبْلَةَ يَدْعُو ثُمَّ حَوَّلَ رِدَاءَهُ ثُمَّ صَلَّى لَنَا رَكْعَتَيْنِ جَهَرَ فِيهِمَا بِالْقِرَاءَةِ
Reference: Sahih Al Bukhari 1025