Authentic
graded by Al-Albani
Mishkat al-Masabih 3896
وَعَن أبي بشيرٍ الأنصاريِّ: أَنَّهُ كَانَ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي بَعْضِ أَسْفَارِهِ فَأَرْسَلَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَسُولًا: «لَا تبقين فِي رَقَبَة بِغَيْر قِلَادَةٌ مِنْ وَتَرٍ أَوْ قِلَادَةٌ إِلَّا قُطِعَتْ»
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.)
Cited in Mishkat al-Masabih (No. 3896).