He saw the Messenger of Allah ﷺ, when he prayed for rain, turn to face the Qiblah, turning his cloak around and raising his hands. (Using translation from Nasāʾī 1512)
أَنَّهُ رَأَى رَسُولَ اللهِ ﷺ «فِي الِاسْتِسْقَاءِ اسْتَقْبَلَ الْقِبْلَةَ وَقَلَبَ الرِّدَاءَ وَرَفَعَ يَدَيْهِ»