Sahih Muslim Book 45, Hadith 103
I perceive as if I am looking towards that dromedary, and in the hadith transmitted on the authority of Thaqafi (the words are):" Unload it and make its back bare for it is accursed."
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.
Go ahead (but that dromedary did not move). She (that slave-girl), out of anger, said: O Allah, let that (dromedary) be damned. Thereupon Allah's Apostle (ﷺ) said: Let the dromedary on which the curse has been invoked not proceed with us.