Musnad Abu Ya'la al-Mawsili 219:4

Zuhayr narrated to us, Yahya bin Sa'id narrated to us, 'Ubaydullah narrated to us, he said: Nafi' informed me, from Salim, from Abu al-Jarrah, from Umm Habibah, from the Prophet, may God bless him and grant him peace, who said: "The angels do not accompany a traveling party that has a bell with it."