The imam turning his rida' around when praying for rain
أَخْبَرَنَا قُتَيْبَةُ، عَنْ سُفْيَانَ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ، عَنْ عَبَّادِ بْنِ تَمِيمٍ، عَنْ عَمِّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم اسْتَسْقَى وَصَلَّى رَكْعَتَيْنِ وَقَلَبَ رِدَاءَهُ .
It was narrated from 'Abbad bin Tamim, from his paternal uncle that: The Prophet (ﷺ) prayed for rain, and prayed two rak'ahs, and turned his rida' around.