Invoking Allah for Rain (Istisqaa)
حَدَّثَنَا مُسْلِمٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنِ الْحَكَمِ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " نُصِرْتُ بِالصَّبَا، وَأُهْلِكَتْ عَادٌ بِالدَّبُورِ ".Narrated Ibn `Abbas:The Prophet (ﷺ) said, "I was granted victory with As-Saba and the nation of 'Ad was destroyed by Ad- Dabur (westerly wind)
From Sahih al-Bukhari, whose reports the scholars accept as authentic.