Mishkat al-Masabih
Mishkat al-Masabih 3528
Arabic hadith text
وَعَن الحسنِ عَنْ سَمُرَةَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى أَنْ يُقَدَّ السَّيْرُ بَيْنَ أُصبعَينِ. رَوَاهُ أَبُو دَاوُد
Translation
Al-Hasan reported from Samurah that the Messenger of God forbade cutting a sandal strap between two toes. Abu Dawud transmitted it.