The Prayer for Seeking Rain (Salat Al-Istisqa)
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 80
وَ سُئِلَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: عَنْ تَحْوِيلِ اَلنَّبِيِّ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ رِدَاءَهُ إِذَا اِسْتَسْقَى قَالَ «عَلاَمَةٌ بَيْنَهُ وَ بَيْنَ أَصْحَابِهِ تَحَوَّلَ اَلْجَدْبُ خِصْباً.
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام was asked about why The Prophet صلى الله عليه وعلى آله وسلم would turn his cloak around when he prayed for rain (Istisqa'). Imam عليه السلام said: "It was a sign between him and his companions, indicating that drought had turned into abundance."
- Ṣaḥīḥ al-Faqīh