´It was narrated from 'Ubaidullah bin Abdullah bin Aqram that his father said:` "I prayed with the Messenger of Allah (ﷺ) and I used to see the whiteness of his armpits when he prostrated."
Hadith ReferenceSunan an-Nasa'i / The Book of The At-Tatbiq (Clasping One\'s Hands Together) / Hadith: 1109
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:إسناده صحيح
Hadith Takhrij«سنن الترمذی/الصلاة 89 (274)، سنن ابن ماجہ/الإقامة 19 (881)، (تحفة الأشراف: 5142) ، مسند احمد 4/35 (صحیح)»