Dua in Istisqa — O Allah water your servants
اللّهُـمَّ اسقِ عِبادَكَ وَبَهائِمَكَ وَانشُر رَحمَتَكَ...
اللّهُـمَّ اسقِ عِبادَكَ وَبَهائِمَكَ وَانشُر رَحمَتَكَ وَأَحيِ بَلَدَكَ المَيِّت
Allahummas-qi AAibadak wabaha-imak wanshur rahmatak wa-ahyi baladakal-mayyit
Translation
O Allah, water Your servants and Your livestock, spread Your mercy and give life to Your dead lands.
When to recite
Recited during the Istisqa (rain prayer) when seeking relief from drought.
Source / Reference
Abu Dawud 1/304, Al-Hakim