Sunan Abi Dawud 1162
سنن أبي داود#1162SahihAbbad b. Tamim al Mazini said on the authority of his uncle (Abd Allah b. Zaid b Asim) who was a Companion of the Messenger of Allah (ﷺ):One day the Messenger of Allah (ﷺ) went out to make supplication for rain. He turned his back towards the people praying to Allah, the Exalted. The narrator Sulaiman b. Dawud said: He faced the qiblah and turned around his cloak and then offered two rak'ahs of prayer. The narrator Ibn Abi Dhi'b said: He recited from the Qur'an in both of them. The version of Ibn al-Sarh adds: By it he means in a loud voice
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (1023) Sahih Muslim (894)
In-book reference: 3:2