كتاب الصلاة
4  
Prayer
(15a)
Chapter: Prostration and its Excellence - Section 1
(14)
باب السجود وفضله - الفصل الأول
Mishkat al-Masabih 889
Al-Bara’ b. ‘Azib reported God's Messenger as saying, “When you prostrate yourself, place the palms of your hands on the ground and raise your elbows.” Muslim transmitted it.
وَعَنِ الْبَرَاءِ بْنِ عَازِبٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: إِذَا سَجَدْتَ فضع كفيك وارفع مرفقيك رَوَاهُ مُسلم
Reference : Mishkat al-Masabih 889
In-book reference : Book 4, Hadith 313