Sahih Bukhari

Allah's Messenger (ﷺ) said, "Whoever obeys me, obeys Allah, and whoever disobeys me, disobeys Allah, and whoever obeys the ruler I appoint, obeys me, and whoever disobeys him, disobeys me."

Allah's Messenger (ﷺ) said, "Surely! Everyone of you is a guardian and is responsible for his charges: The Imam (ruler) of the people is a guardian and is responsible for his subjects; a man is the guardian of his family (household) and is responsible for his subjects; a woman is the guardian of her husband's home and of his children and is responsible for them; and the slave of a man is a guardian of his master's property and is responsible for it. Surely, everyone of you is a guardian and responsible for his charges."

That while he was included in a delegation of Quraish staying with Muawiya, Muawiya heard that `Abdullah bin `Amr had said that there would be a king from Qahtan tribe, whereupon he became very angry. He stood up, and after glorifying and praising Allah as He deserved, said, "To proceed, I have come to know that some of you men are narrating things which are neither in Allah's Book, nor has been mentioned by Allah's Messenger (ﷺ) . Such people are the ignorant among you. Beware of such vain desires that mislead those who have them. I have heard Allah's Messenger (ﷺ) saying, 'This matter (of the caliphate) will remain with the Quraish, and none will rebel against them, but Allah will throw him down on his face as long as they stick to the rules and regulations of the religion (Islam).'"

Allah's Messenger (ﷺ) said, "This matter (caliphate) will remain with the Quraish even if only two of them were still existing."

Allah's Messenger (ﷺ) said, "Do not wish to be like anyone, except in two cases: (1) A man whom Allah has given wealth and he spends it righteously. (2) A man whom Allah has given wisdom (knowledge of the Qur'an and the Hadith) and he acts according to it and teaches it to others."

Allah's Messenger (ﷺ) said, "You should listen to and obey, your ruler even if he was an Ethiopian (black) slave whose head looks like a raisin."