Matthew Poole and continuators on Deuteronomy 31:19

19 Now therefore write ye this song for you▪ and teach it the children of Israel, put it in their mouths , that this song may be a witness for me against the children of Israel.

Which is contained Deut. 32. and is put into a song that it be better learned, and more fixed in their minds and memories.

Cause them to learn it, and sing it one to another, to oblige them to more circumspection and watchfulness.

Of my kindness in giving them so many blessings, of my patience in bearing so long with them, of my clemency in giving them such fair and plain warnings, and my justice in punishing such an unthankful perverse and incorrigible people.