Abu Dawud
Prayer
Book Number: 002 / Hadith Number: 1164
Narated By Umayr, the client of AbulLahm : Umayr saw the Prophet (pbuh) praying for rain at Ahjar az-Zayt near az-Zawra', standing, making supplication, praying for rain and raising his hands in front of his face, but not lifting them above his head.