أَخْبَرَنَا هِشَامُ بْنُ عَبْدِ الْمَلِكِ أَبُو تَقِيٍّ الْحِمْصِيُّ، قَالَ حَدَّثَنَا بَقِيَّةُ، عَنْ شُعَيْبٍ، عَنِ الزُّهْرِيِّ، عَنْ عَبَّادِ بْنِ تَمِيمٍ، عَنْ عَمِّهِ، أَنَّهُ رَأَى رَسُولَ اللَّهِ صلى الله عليه وسلم فِي الاِسْتِسْقَاءِ اسْتَقْبَلَ الْقِبْلَةَ وَقَلَبَ الرِّدَاءَ وَرَفَعَ يَدَيْهِ ‏.‏

It was narrated from 'Abbad bin Tamim, from his paternal uncle, that: He saw the Messenger of Allah (PBUH), when he prayed for rain, turn to face the Qiblah, turning his cloak around and raising his hands. Translation Not Available

Book Ref: Sunan An Nisai Book 17 Hadith 1512
Web Ref:  Sunan An Nisai Vol 2 Book 17 Hadith 1513