عَنِ الْمُسْتَوْرِدِ بْنِ شَدَّادٍ رَضِيَ اللَّهُ عَنْهُ صَاحِبِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ إِذَا تَوَضَّأَ خَلَّلَ أَصَابِعَ رِجْلَيْهِ بِخِنْصَرِهِ
It is narrated from the Companion of the Messenger, Sayyiduna Mustawrid bin Shaddad (may Allah be pleased with him), that when the Messenger of Allah (peace and blessings be upon him) performed ablution, he would use his little finger to pass between the toes of his feet.