1690/1 - Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “Angels do not accompany a group of travelers who have with them a dog or a bell.” [Narrated by Muslim]
1691/2 - He also reported that the Prophet (may Allah’s peace and blessings be upon him) said: “The bell is the musical instrument of the devil.” [Narrated by Muslim]
1) Deterrence from hanging bells, particularly on animals, because it is prohibited.
2) The bell is a musical instrument that the devil loves and the honorable angels are averse to.
3) A wise and fortunate person would diligently do the acts pleasing to Allah Almighty and shun everything loved by Satan.