When it rains1 du'a

O Allah, (bring) beneficial rain clouds.

Reference:Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 2/518.Hisnul Muslim 172

اللّهُمَّ صَيِّـباً نافِـعاً

Transliteration

Allāhumma ṣayyiban nāfi`a.

Translation

O Allah, (bring) beneficial rain clouds.