(51) باب صِفَةِ السُّجُودِ
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." (TR)
Reference (TR): Sunan an-Nasa'i 1108 (TR)
In-book reference (TR): Book 12, Hadith 80 (TR)
English translation (TR): Vol. 2, Book 12, Hadith 1109 (TR)