From Sahih Muslim (Hadith 6604):
Imran b. Husain reported:We were with Allah's Messenger (ﷺ) in some of his journeys and there was a woman from the Ansar riding a she-camel that it shied and she invoked curse upon that. Allah's Messenger (ﷺ) heard it and said: Unload that and set it free for it is accursed. 'Imran said: I still perceive that (dromedary) walking amongst people and none taking any notice of that
Reference: Muslim 6604