Moses almost never loses his temper in the written text, but on this night he does. Targum Pseudo-Jonathan on Exodus 11:8 describes him warning Pharaoh that the day is coming when Pharaoh's own servants will chase him down and beg him to leave. Pharaoh, who has spent months demanding that Moses approach, will soon send every courtier he has to plead for his departure.
Then comes the final line: "And he went out from Pharoh in great anger." The Aramaic does not soften it. Moses, the servant of God who begged not to take up this mission at the bush, walks out of the throne room burning.
What does that anger mean? The rabbis read it as the right anger — the clean kind, directed at injustice rather than at wounded pride. Moses has watched Pharaoh harden his face through nine plagues, demand a negotiation on every one, and still refuse to let the children go. He has seen the Hebrew midwives threatened and babies thrown into the Nile. Now, at the edge of the final plague, Moses breaks his composure in a way that honors the suffering of his people.
The Targum preserves that fury because it teaches something. A prophet who never gets angry is not really listening. Moses leaves Pharaoh's palace for the last time not as a courtier making a graceful exit but as the brother of slaves who has seen enough.
Takeaway: Righteous anger, held in reserve until the precise moment, is not a failure of the prophet. It is part of the job.