וַיָּבֹ֣א מֹשֶׁ֗ה וַיְדַבֵּ֛ר אֶת־כָּל־דִּבְרֵ֥י הַשִּׁירָֽה־הַזֹּ֖את בְּאָזְנֵ֣י הָעָ֑ם ה֖וּא וְהוֹשֵׁ֥עַ בִּן־נֽוּן׃
And Moses came and spoke all the words of this song in the ears of the people, he, and Hoshea the son of Nun.
Read kabbalistic (mystical) interpretation of Deuteronomy 32:44: and classical mystical sources.