Allah revealed to Prophet Musa (as): “The next time you come to converse with Me, bring along someone who is inferior to you.”
Musa (as) set out in quest of such a person but failed to find one, because every person that he encountered, he did not have the nerve to think that he was superior to that person.
Then, deciding to direct his search amongst the animals, his eyes fell upon a diseased dog. He decided to take it along with him. He tied a rope around the dog’s neck and began pulling it but after a short distance, he regretted his action and set the dog free. He returned empty-handed to have his conversation with Allah.
“Why did you not bring someone along with you, in accordance with My order?” came the voice from Allah.
Musa (as) beseeched, “O’ Lord! I failed to find anyone who could be inferior to me.” The reply came from Allah: “By My Might and Glory! Had you brought someone, regarding him to be inferior to yourself, I would have surely erased your name from the list of Prophets (and relieved you of the rank of Prophethood)!”( Namunah-e-Ma’arif, Volume 2, Page 676; Layaliul Akhbar, Page 197 )