The Messenger of Allah ﷺ said: "When you perform Wudu', do so properly, and wash in between the fingers (Al-Asabi')."[2] [1] Al-Asabi' is plural meaning fingers as well as toes, and the author mentioned only one narration on the topic whereas some of them clarify "of the hands and feet." So he mentioned the general wording amids chapters how to wash the feet. [2] Part of this narration preceded under No. 87.  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا تَوَضَّأْتَ فَأَسْبِغِ الْوُضُوءَ وَخَلِّلْ بَيْنَ الأَصَابِعِ  

Messenger of Allah said: "When performing Wudu go between the fingers of your hands and (toes of) your feet."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا تَوَضَّأْتَ فَخَلِّلْ بَيْنَ أَصَابِعِ يَدَيْكَ وَرِجْلَيْكَ  

The Messenger of Allah ﷺ said: "When you perform Wudu', do so properly, and wash in between the fingers (Al-Asabi')."[2] [1] Al-Asabi' is plural meaning fingers as well as toes, and the author mentioned only one narration on the topic whereas some of them clarify "of the hands and feet." So he mentioned the general wording amids chapters how to wash the feet. [2] Part of this narration preceded under No. 87. (Using translation from Nasāʾī 114)   

قَالَ رَسُولُ اللَّهِ ﷺ «إِذَا تَوَضَّأْتَ فَخَلِّلِ الْأَصَابِعَ»  

"إذَا توضَّأتَ فخلِّلْ الأصابعَ".  

Messenger of Allah said: "When performing Wudu go between the fingers of your hands and (toes of) your feet." (Using translation from Tirmidhī 39)   

"إذَا توضَّأتَ فخلِّل أصابعَ يديكَ ورجْلَيكَ".