Anas reported that the Messenger of Allah (ﷺ) was not accustomed to raice his hands in any supplication he made except when praying for rain. (He would then raise [his hands] high enough) that the whiteness of his armpits became visible. 'Abd al-A'la said that (he was in doubt whether it was) the whiteness of his armpit or armpits.
Reference | : Sahih Muslim 895c |
In-book reference | : Book 9, Hadith 7 |
USC-MSA web (English) reference | : Book 4, Hadith 1953 |
(deprecated numbering scheme) |