It is narrated from Sayyiduna Imran bin Husain (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) was on a journey when he heard someone cursing. He said: "What is this?" The people replied: "It is such-and-such woman; she has cursed her mount." He said: "Unload her belongings from it, for it has been cursed." So the people unloaded her belongings from it. Sayyiduna Imran (may Allah be pleased with him) said: It is as if I am looking at it now; it was a grayish she-camel.
Hadith Referenceسنن دارمي / من كتاب الاستئذان / 2712
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده صحيح وأيوب هو: ابن كيسان وأبو قلابة هو: عبد الله بن زيد وأبو المهلب هم: عمرو بن معاوية، [مكتبه الشامله نمبر: 2719]
In the narration of Sahih Muslim it is stated «خُذُوْامَاعَلَيْهَا» that is, "Remove everything that is on it." Accordingly, both the rider and the luggage were removed from it. This was a warning and reprimand for that woman: since you cursed this mount, it is not necessary for you to ride it. Thus, it is established from this that one should not curse a camel, horse, donkey, or any mount, and the meaning of la'nat (curse) is Allah Ta'ala's wrath and being distanced from His mercy, and whoever is distant from Allah's mercy, there is no good in him. Also, the characteristic of a believer is that «لَايَكُوْنلَعَانًا» he does not curse. And Allah knows best.