Shemot 4:28

28 And Moshe told Aharon kol divrei Hashem who had sent him, and all haOtot He had commanded him.

Shemot 4:28 Meaning and Commentary

Exodus 4:28

And Moses told Aaron all the words of the Lord, who had sent
him
He declared his mission and commission from God, and gave him the particulars of what was to be said both to the people of Israel and to the king of Egypt; and this he did, because Aaron was to be his spokesman unto them: and all the signs which he had commanded him;
to do, first before the children of Israel, and then before Pharaoh; before the one to obtain credit of them, as being sent of God, and before the other to get leave of him for the departure of Israel out of Egypt.

Shemot 4:28 In-Context

26 So He let him go; then she said, A choson damim thou art, because of the circumcision (i.e., [bris] milah).

27 And Hashem said to Aharon, Go into the midbar to meet Moshe. And he went, and met him in the Har HaElohim, and kissed him.

28 And Moshe told Aharon kol divrei Hashem who had sent him, and all haOtot He had commanded him.

29 And Moshe and Aharon went and assembled together kol Ziknei Bnei Yisroel;

30 And Aharon spoke all hadevarim which Hashem had spoken unto Moshe; and he did haOtot before the eyes of HaAm.