It was narrated from Anas bin Malik that the Prophet (ﷺ) did not raise his hands in any of his supplications except when praying for rain (Istisqa’), when he raised his hands so high that the whiteness of his armpits could be seen.
Hadith ReferenceSunan Ibn Majah / Establishing the Prayer and the Sunnah Regarding Them / Hadith: 1180
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:بخاري ومسلم