Sahih Al Bukhari Hadith Number 2324

Narrated Abu Huraira: The Prophet (peace be upon him) said, “While a man was riding a cow, it turned towards him and said, ‘I have not been created for this purpose (i.e. carrying), I have been created for ploughing.” The Prophet (peace be upon him) added, “I, Abu Bakr and `Umar believe in the story.” The Prophet (peace be upon him) went on, “A wolf caught a sheep, and when the shepherd chased it, the wolf said, ‘Who will be its guard on the day of wild beasts, when there will be no shepherd for it except me?’ “After narrating it, the Prophet (peace be upon him) said, “I, Abu Bakr and `Umar too believe it.” Abu Salama (a sub-narrator) said, “Abu Bakr and `Umar were not present then.”