His paternal uncle had told him that he went out with the Messenger of Allah ﷺ to pray for rain. He turned his rida' around, and turned his back to the people, then he prayed two rak'ahs and recited loudly. (Using translation from Nasāʾī 1509)
أَنَّهُ «خَرَجَ مَعَ رَسُولِ اللهِ ﷺ يَسْتَسْقِيَ فَحَوَّلَ رِدَاءَهُ وَحَوَّلَ إِلَى النَّاسِ ظَهْرَهُ وَدَعَا ثُمَّ صَلَّى رَكْعَتَيْنِ فَقَرَأَ يَجْهَرُ»