this song. Second mention of this Song.
testify against. answer them to their face.
not be forgotten. This song quoted and referred to more than any other part of Pentateuch.
I sware. The Samaritan Pentateuch, Septuagint, and Syriac add "unto their fathers".
21 And it shall come to pass, when many evils and troubles are befallen them, that this song shall testify againstc them as a witness; for it shall not be forgotten out of the mouths of their seed: for I know their imagination which they go about, even now, before I have brought them into the land which I sware.