See Numbers 12:3. The anger of Moses was like that of Phinehas, see Numbers 15:11-13; Numbers 15:11-13. The prophet Ezekiel's bitterness of spirit was of the same kind: Ezekiel 3:14.
Related Commentaries of Exodus 11:8
Exodus 11:8
8 And all these thy servants shall come down unto me, and bow down themselves unto me, saying, Get thee out, and all the people that followa thee: and after that I will go out. And he went out from Pharaoh in a great anger.