´It was narrated that Abu Bakr bin Abi Shaikh said:` "I was sitting with Salim when a caravan belonging to Umm Al-Banin passed by us, and they had bells with them. Salim narrated to Nafi' from his father, that the Prophet [SAW] said: 'The angels do not accompany a caravan that has small bells with them.' How often do you see small bells with these people."
Explanation & Benefits
Hafiz Muhammad Ameen
English Translation:
There is a difference of opinion regarding the reason for the prohibition of bells and similar things. Either it is because it is a satanic sound, as it intoxicates animals and people, and thus falls under the same ruling as music. Or, it is because the sound of bells and the like would reveal the arrival of an army, whereas sometimes a sudden attack was intended. If this is the reason, then the prohibition would apply only in specific circumstances. However, the correct view is that it is absolutely prohibited, because in hadith number 5224, the house is also mentioned.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 5222