Abu Bashir al-Ansari told that when he was with God's Messenger on one of his journeys God’s Messenger sent one to say, “No necklace of bowstring or anything else must be left on a camel’s neck, but must be cut off.” (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الجهاد / 3896
Hadith Gradingالألبانی:مُتَّفق عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3005) و مسلم (2115/105)»