It wasnarrated from Anas bin Malik that the Prophet (ﷺ) did notraise hishands in any of his supplications except when praying forrain(Istisqa'), when he raised his hands so high that the whitenessofhis armpits could be seen. (DE)
English reference (DE): Vol. 1, Book 5, Hadith 1180 (DE)
Arabic reference (DE): Book 5, Hadith 1236 (DE)