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]‏