Midrasch zu Könige I 19:1

Why did Pharaoh and his servants approach him, saying: Get you? The time Pharaoh told him: Get thee from me, see my face no more (ibid. 10:29), he (Moses) insisted: But we shall not leave until all these servants shall come down unto me (ibid. 11:9), to escort us from this place. This verse indicates that Moses paid homage to royalty, since he did not say to him: “You and all your servants.” In fact, the Holy One, blessed be He, had previously charged Moses and Aaron to be respectful to royalty, as it is said: And the Lord spoke unto Moses and Aaron, and gave them a charge unto the children of Israel, and unto Pharaoh king of Egypt (ibid. 6:13). Joseph was respectful to royalty when he said: It is not in me; God will give Pharaoh an answer of peace (Gen. 41:6). Jacob was respectful to royalty; and Israel strengthened himself, and sat upon the bed (ibid. 49:2). Elijah paid homage to royalty, as is said: And the hand of the Lord was on Elijah (I Kings 18:46). Hananiah, Mishael, and Azariah also were respectful to royalty, and so was Daniel.