The Targum Pseudo-Jonathan on Exodus 11:3 notes a transformation that had happened gradually, almost without anyone noticing.
"The Lord gave the people favour before the Mizraee; also the man Mosheh was very great in the land of Mizraim before the servants of Pharoh and before his people."
At the beginning of Exodus, Moses was a fugitive. A wanted man. A shepherd in Midian with a stammer and a past. When he first returned to Egypt, he was nobody. Pharaoh's court barely recognized him. His own people doubted him.
But now, on the eve of the final plague, the Aramaic paraphrase describes Moses as rav lachda — very great. Great before Pharaoh's servants. Great before Pharaoh's people. Great, in fact, before everyone except Pharaoh himself, who still refused to admit what the entire country now understood: that the God of this man ran Egypt.
The Targumist, preserved in the tradition attributed to Yonatan ben Uzziel, adds a poignant note. The Lord gave Israel chen — favor — in the eyes of Egypt. After nine plagues, the Egyptians were no longer afraid of Israel. They were afraid for Israel. They wanted the slaves to leave safely, even profitably.
The Maggid teaches: a reputation built on truth grows in silence. Moses never campaigned for greatness. He simply delivered messages, and each one came true. Over time, a nation learned that when this man said something, it happened. That is the slow, steady accumulation of prophetic authority — and it cannot be faked.