كتاب الصلاة
2  
The Book of Prayer
Bulugh al-Maram 300
Narrated Wa'il bin Hujr (RA):
Whenever the Prophet (ﷺ) bowed, he would spread out his fingers and when he prostrated he would bring his fingers together. [Reported by al-Hakim).
وَعَنْ وَائِلِ بْنِ حُجْرٍ ‏- رضى الله عنه ‏- { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-كَانَ إِذَا رَكَعَ فَرَّجَ بَيْنَ أَصَابِعِهِ , وَإِذَا سَجَدَ ضَمَّ أَصَابِعَهُ } رَوَاهُ اَلْحَاكِمُ .‏ 1
Reference : Bulugh al-Maram 300
In-book reference : Book 2, Hadith 300
English translation : Book 2, Hadith 298
Hadith Text
Reference