It is narrated from Abdullah bin Zaid Al-Mazani (may Allah be pleased with him) that he stated: The Messenger of Allah (peace and blessings be upon him) went out to the Eid ground to perform the prayer for seeking rain. He faced the Qiblah, turned his cloak inside out, and offered two units of prayer.
Hadith Referenceمسند الإمام الشافعي / كتاب العيدين والأضاحي والاستسقاء / 512
Hadith Takhrijاخرجه البخاري ، الاستسقاء ، باب تحويل الرداء في الاستسقاء (1012) ، (1005) ومسلم، الاستسقاء، باب صلاة الاستسقاء (894)۔