اللّهُمَّ اسْقِ عِبادَكَ وَبَهـائِمَك، وَانْشُـرْ رَحْمَـتَكَ وَأَحْيِي بَلَـدَكَ المَيِّـت
Allāhumma’sqi `ibādaka wa bahā'imak, wanshur raḥmatak, wa aḥyi baladaka ‘l-mayyit
O Allah, give water to Your slaves, and Your livestock, and spread Your mercy, and revive Your dead land.
Abu Dawud 1/305. Al-Albani graded it good in Sahih Abu Dawud 1/218.