Sunan Abi Dawud Book 15, Hadith 77
The Messenger of Allah (ﷺ) said: Tie the horses, rub down their forelocks and their buttocks (or he said: Their rumps), and put things on their necks, but do not put bowstrings.
Abu Bashir Al Ansari said that he was with the Apostle of Allaah(ﷺ) on one of his journeys. The Apostle of Allaah(ﷺ)sent a messenger. The narrator ‘Abd Allah bin Abu Bakr said “I think he said while the people were sleeping. No necklace of bowstring or anything else must be left on a Camels’ neck, must be cut off. The narrator Malik said “I think this was due to evil eye.”
The Prophet (ﷺ) said: The angels do not go with a travelling company in which there is a bell.