וַיְהִ֥י בַדֶּ֖רֶךְ בַּמָּל֑וֹן וַיִּפְגְּשֵׁ֣הוּ יְהוָ֔ה וַיְבַקֵּ֖שׁ הֲמִיתֽוֹ׃
And it came to pass on the way at the lodging-place, that the LORD met him, and sought to kill him.
Rashi on Exodus
ויהי AND HE WAS — Moses was — DURING THE JOURNEY IN THE LODGING PLACE.
Rashbam on Exodus
ויפגשהו ה', in this instance a reference to the Lord’s angel. Moses’ sin consisted of needlessly slowing down the carrying out of his mission by taking his wife and children along.
Sforno on Exodus
ויהי בדרך במלון, when he was on the way from the desert to Midian with his wife and children. The Torah tells of this incident after concluding the report of how G’d appointed Moses as the leader of the Jewish people.