Narrated Abu Bashir Al-Ansari:That he was in the company of Allah's Messenger (ﷺ) on some of his journeys. (The sub-narrator `Abdullah adds, "I think that Abu Bashir also said, 'And the people were at their sleeping places.") Allah's Apostle sent a messenger ordering: "There shall not remain any necklace of string or any other kind of necklace round the necks of camels except it is cut off."
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ، عَنْ عَبَّادِ بْنِ تَمِيمٍ، أَنَّ أَبَا بَشِيرٍ الأَنْصَارِيّ َ ـ رضى الله عنه ـ أَخْبَرَهُ أَنَّهُ، كَانَ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي بَعْضِ أَسْفَارِهِ ـ قَالَ عَبْدُ اللَّهِ حَسِبْتُ أَنَّهُ قَالَ ـ وَالنَّاسُ فِي مَبِيتِهِمْ، فَأَرْسَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم رَسُولاً أَنْ لاَ يَبْقَيَنَّ فِي رَقَبَةِ بَعِيرٍ قِلاَدَةٌ مِنْ وَتَرٍ أَوْ قِلاَدَةٌ إِلاَّ قُطِعَتْ.
Bukhari
Fighting for the Cause of Allah (Jihaad) • Hadith 214