´It was narrated that Abu Hurairah said:` "If I were in front of the Messenger of Allah (ﷺ) I would be able to see the whiteness of his armpits." (One of the narrators) Abu Mijlaz said: "It is as if he said that because he was praying."
Hadith ReferenceSunan an-Nasa'i / The Book of The At-Tatbiq (Clasping One\'s Hands Together) / Hadith: 1108
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:إسناده حسن