Why was the Abyssinian slave specifically mentioned in the hadith regarding the obligation of obedience and loyalty?

Question:
May Allah reward you. Regarding the command of the Messenger (peace and blessings be upon him) to obey and show loyalty, even if the ruler is an Abyssinian slave, the question is: Why was the Abyssinian slave specifically singled out here, rather than anyone else?

Answer:
That is, he has no noble lineage. Some people who have no noble lineage look down on him. The Messenger (peace and blessings be upon him) said: The one in authority is to be obeyed, even if he is a slave. And if a worshipper is appointed over you, the criterion is his position, not his lineage. The criterion is his position. Yes.