ENOfficial
Allāhumma ṣayyiban nāfi`a. O Allah, (bring) beneficial rain clouds. Reference: Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 2/518.
Source: sunnah.com
Other translations
Arabic
اللّهُمَّ صَيِّـباً نافِـعاً
sunnah.com
Hisn al-Muslim
Book 1Hadith Number 172