Hadith 5564
Chapter 13: Mentioning the Reason Why These Mixtures are Forbidden, Which is That One of Them is Mor - كتاب الأشربة
أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَخْبَرَنَا عَبْدُ اللَّهِ، عَنْ هِشَامِ بْنِ حَسَّانَ، عَنْ أَبِي إِدْرِيسَ، قَالَ شَهِدْتُ أَنَسَ بْنَ مَالِكٍ أُتِيَ بِبُسْرٍ مُذَنَّبٍ فَجَعَلَ يَقْطَعُهُ مِنْهُ .
It was narrated that Abu Idris said:
"I saw Anas bin Malik when some Busr which had extra bits were brought to him, and he started to cut them off."
Reference : Sunan an-Nasa'i 5564
In-book reference : Book 51, Hadith 25