3. The Book Of The Prayer For Rain (Kitab al-Istisqa') - كتاب الاستسقاء
3) Chapter: Raising The Hands During Istisqa'
Narrated Umayr, the client of AbulLahm:
Umayr saw the Prophet (ﷺ) 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.