It is narrated from Sayyiduna Abdullah bin Zaid (may Allah be pleased with him) that once the Prophet (peace and blessings of Allah be upon him) went out to pray for rain. On that occasion, he turned his cloak while facing the Qiblah. The Prophet (peace and blessings of Allah be upon him) kept standing and supplicating, and thus it rained.
Hadith Referenceمسند احمد / مسند المدنيين رضي الله عنهم اجمعين / 16455