וַיִּשְׁמַ֤ע פַּרְעֹה֙ אֶת־הַדָּבָ֣ר הַזֶּ֔ה וַיְבַקֵּ֖שׁ לַהֲרֹ֣ג אֶת־מֹשֶׁ֑ה וַיִּבְרַ֤ח מֹשֶׁה֙ מִפְּנֵ֣י פַרְעֹ֔ה וַיֵּ֥שֶׁב בְּאֶֽרֶץ־מִדְיָ֖ן וַיֵּ֥שֶׁב עַֽל־הַבְּאֵֽר׃
Now when Pharaoh heard this thing, he sought to slay Moses. But Moses fled from the face of Pharaoh, and dwelt in the land of Midian; and he sat down by a well.
Rashi on Exodus
וישמע פרעה AND PHARAOH HEARD IT — they (Dathan and Abiram) slandered (denounced) him (Exodus Rabbah 1:31).
Rashbam on Exodus
וישב בארץ מדין. A general description of the locality, followed by more details of why he settled there, i.e. his experience at the well. He had originally only stopped there for refreshment as do most travelers. The Torah follows this with the story of Yitro and his daughters.
Sforno on Exodus
. וישב בארץ מדין. He had decided to remain for a while in that country.