Comentário sobre Êxodo 4:19

FOR ALL THE MEN ARE DEAD — Who were these men? Dathan and Abiram: Really they were still alive, but they had come down in the world, having lost their property, and a poverty-stricken man may well be regarded as dead (Nedarim 64b).

AND THE ETERNAL SAID UNTO MOSES IN MIDIAN: GO, RETURN UNTO EGYPT, etc. Rabbi Abraham ibn Ezra said, “There is no strict chronological order in the narrative of the Torah,²⁸⁹In Verse 18 it says that Moses bid farewell to Jethro because he was ready to return to Egypt. Why then was it necessary now that G-d command him to return there? For this reason, Ibn Ezra renders Verse 19 as meaning: “now the Eternal had said.” and the explanation thereof is, ‘now the Eternal had said.’ There are many similar cases.”
But Ibn Ezra’s interpretation here is not correct. The first Divine communication, [i.e., that Moses return to Egypt], was not in Midian but at Mount Sinai.²⁹⁰Above, 3:10. Come now therefore, and I will send thee unto Pharaoh. In Midian He spoke to him only at this time, [as mentioned in the present verse]. However, when Moses accepted the mission by word of G-d to go to Egypt and he returned to Midian to obtain permission from his father-in-law, it was his intention to go alone and disguised. It is for this reason that Moses said to Jethro, Let me go, I pray thee, and return unto my brethren that are in Egypt, and see whether they be yet alive.²⁹¹Verse 18. That is to say, “I will see my brethren whether they be yet alive and I will return,” for it was to be in the nature of a visit by one who is anxious to see his brethren. But then the Eternal said to him in Midian, Go, return unto Egypt, that is to say, “Arise, go out of this land and return to the land of Egypt and have no fear there, for all those who sought to harm you have died, and stay there with the people until you will bring them forth from there.” Therefore Moses took his wife and children since it was the right way to bring them with him, insamuch as the children of Israel would have greater reliance on him because of it. [They would say]: “A free man in Midian who lives peacefully in his home with his children and with his wife, a son-in-law of the priest of the land, would not have brought them to be with slaves and make their lives bitter with hard service if his heart were not steadfast. He is trusting that they will soon go out from Egypt and that he will go up with them to the land of Canaan, and that it will then not be necessary for him to return to Midian to take his wife and his children from there.”

ויאמר ה' אל משה במדין, where he had settled at the time he had fled on account of Pharaoh as we know from 2,15. Now, while Moses was back in Midian, (in the civilised regions) G’d told Moses to return to Egypt as all the people whom had had reason to be afraid of had already died.. (compare 2,23)