Comentario sobre Exodo 4:28

AND MOSES TOLD AARON ALL THE WORDS OF THE ETERNAL WHEREWITH HE HATH SENT HIM. This means that he told all the words which were spoken between him and the Holy One, blessed be He, and all the objections he had raised against undertaking the mission, and that he was sent against his own will. This is the intent of the word kol (‘all’ the words of the Eternal). In Midrash Chazit³¹⁷Another name for the Midrash Rabbah on the Song of Songs. The quote is found there, 4:12. See Vol. I, p. 292, Note 73, for the reason of the name Chazit or Chazita. [we find it stated]: “And the Rabbis say that Moses revealed to Aaron the Tetragrammaton [which had been revealed to him].” The intent of their explanation is that Moses told Aaron the Divine Names mentioned above³¹⁸See above, 3:13. by which He sent him, and the Name that is derived [from them],³¹⁹See my Hebrew commentary for elucidation of this Cabalistic subject. and the explanation that is inherent in them.³¹⁹See my Hebrew commentary for elucidation of this Cabalistic subject.

את כל דברי ה', “all the words of the Lord.” He explained to Aaron that he had repeatedly refused the mission G’d wanted him to carry out, and that in the end he had accepted the task only under duress.

ויגד משה לאהרן, Moses told Aaron all that had transpired since he last saw him many years ago, including the fact that he had brought his wife and children with him on this journey, until the very first inn. Upon hearing this, Aaron told him that there were already far too many Israelites suffering in Egypt, and he did not need to increase their number by bringing along his family. We may assume, as did our sages, that this prompted Moses to send his family back to Midian to her father’s home.