Sahih Bukhari

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