Commentary for Deuteronomy 31:30

את דברי השירה הזאת עד תומם, including 32,36 כי ידין and כי אשא in 32,40, although those verses are not strictly speaking, part of Moses’ warning and testimony.

את דברי השירה הזאת, “the words of this song;” this is a reference to the next portion, Haazinu, the major part of which consists of Moses’ parting song/poem to his nation. The subject is that G-d had provided for them in the desert as well as in the land of Israel, and how in spite of this they would forsake Him and be exiled, until eventually they would be redeemed from exile.