וַיַּגֵּ֤ד מֹשֶׁה֙ לְאַֽהֲרֹ֔ן אֵ֛ת כָּל־דִּבְרֵ֥י יְהוָ֖ה אֲשֶׁ֣ר שְׁלָח֑וֹ וְאֵ֥ת כָּל־הָאֹתֹ֖ת אֲשֶׁ֥ר צִוָּֽהוּ׃
And Moses told Aaron all the words of the LORD wherewith He had sent him, and all the signs wherewith He had charged him.
Read kabbalistic (mystical) interpretation of Exodus 4:28: and classical mystical sources.