Redirecting rain rather than stopping it
The same man came back a week later, this time about flooding.
اللَّهُمَّ عَلَى رُءُوسِ الْجِبَالِ وَالآكَامِ وَبُطُونِ الأَوْدِيَةِ وَمَنَابِتِ الشَّجَرِ
Allāhumma ʿalā ru'ūsi-l-jibāli wa-l-ākāmi wa buṭūni-l-awdiyati wa manābiti-sh-shajar.
“O Allah, upon the tops of the mountains, the hills, the beds of the valleys and where the trees grow.”
The full narration
Narrated Anas bin Malik:A man came to Allah's Messenger (ﷺ) and said, "O Allah's Messenger (ﷺ)! Livestock are destroyed and the roads are cut off. So please invoke Allah." So Allah's Messenger (ﷺ) prayed and it rained from that Friday to the next Friday. Then he came to Allah's Messenger (ﷺ) and said, "O Allah's Messenger (ﷺ)! Houses have collapsed, roads are cut off and the livestock are destroyed." So Allah's Messenger (ﷺ) prayed, "O Allah! (Let it rain) on the tops of mountains, on the plateaus, in the valleys and over the places where trees grow." So the clouds cleared away from Medina as clothes are taken off
Source
Ṣaḥīḥ al-Bukhārī · 1017
- Agreed upon as authentic (al-Bukhārī / Muslim)