The Book of Prayers (Kitab Al-Salat) 
Muslim :: Book 4 : Hadith 1000
'Abdullah b. Malik ibn Bujainah reported: When the Prophet (may peace be upon him) prostrated, lie spread out his arms so that the whiteness of his armpits was visible.
The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 1000
'Abdullah b. Malik ibn Bujainah reported: When the Prophet (may peace be upon him) prostrated, lie spread out his arms so that the whiteness of his armpits was visible.