Musnad Abu Ya'la al-Mawsili 219:12

Abdullah ibn Muhammad narrated to us, Juwayriyah narrated to us, from Nafi’, that Salim ibn Abdullah ibn Umar narrated to him, that al-Jarrah, the freed slave of Umm Habibah, the wife of the Prophet, may Allah bless him and grant him peace, narrated to Abdullah ibn Umar, that Umm Habibah narrated to him, that the Messenger of Allah, may Allah bless him and grant him peace, said: "The caravan that has a bell in it, the angels do not accompany it."