民数記 3:1

ואלה תולדת אהרן ומשה AND THESE ARE THE OFFSPRING OF AARON AND MOSES — But it mentions only the sons of Aaron! But they also are called the sons of Moses because he taught them the Torah. This tells us that whoever teaches the Torah to the son of his fellow man Scripture regards it to him as though he had begotten him (Sanhedrin 19b). ביום דבר ה׳ את משה IN THE DAY THAT THE LORD SPAKE TO MOSES did these children (these of Aaron) become his (Moses’) children, because then for the first time he taught them what he heard from the Almighty.

These also are the generations of Aharon and Moshe in the day that the Lord spoke with Moshe in mount Sinay.

וְאֵ֛לֶּה תּוֹלְדֹ֥ת אַהֲרֹ֖ן וּמֹשֶׁ֑ה בְּי֗וֹם דִּבֶּ֧ר יְהֹוָ֛ה אֶת־מֹשֶׁ֖ה בְּהַ֥ר סִינָֽי׃