Messenger of Allah ﷺ went out to this Musalla (praying place) to offer the prayer of Istisqa.' He invoked Allah for rain and then faced the Qibla and turned his Rida' (upper garment) inside out.
خَرَجَ النَّبِيُّ ﷺ إِلَى هَذَا الْمُصَلَّى يَسْتَسْقِي فَدَعَا وَاسْتَسْقَى ثُمَّ اسْتَقْبَلَ الْقِبْلَةَ وَقَلَبَ رِدَاءَهُ
Ibn Tamim narrated on the authority of his uncle ('Abdullah b. Zaid) that the Messenger of Allah ﷺ went out to the place of prayer and prayed for rain and faced towards Qibla, and turned round his mantle and prayed two rak'ahs.
خَرَجَ النَّبِيُّ ﷺ إِلَى الْمُصَلَّى فَاسْتَسْقَى وَاسْتَقْبَلَ الْقِبْلَةَ وَقَلَبَ رِدَاءَهُ وَصَلَّى رَكْعَتَيْنِ
Ibn Tamim narrated on the authority of his uncle ('Abdullah b. Zaid) that the Messenger of Allah ﷺ went out to the place of prayer and prayed for rain and faced towards Qibla, and turned round his mantle and prayed two rak'ahs. (Using translation from Muslim 894b)
أَنَّ النَّبِيَّ ﷺ خَرَجَ إِلَى الْمُصَلَّى «يَسْتَسْقِي فَاسْتَقْبَلَ الْقِبْلَةَ وَقَلَبَ رِدَاءَهُ وَصَلَّى رَكْعَتَيْنِ»