21 And when many disasters and calamities come on them, this song will testify against them, because it will not be forgotten by their descendants. I know what they are disposed to do, even before I bring them into the land I promised them on oath."
21 And it shall come to pass, when many evils and troubles are befallen them, that this song shall testify against
21 And when many evils and troubles have come upon them, this song shall confront them as a witness (for it will live unforgotten in the mouths of their offspring). For I know what they are inclined to do even today, before I have brought them into the land that I swore to give."
21 and then things start falling apart, many terrible things happening, this song will be there with them as a witness to who they are and what went wrong. Their children won't forget this song; they'll be singing it. Don't think I don't know what they are already scheming to do, and they're not even in the land yet, this land I promised them."
21 Then it shall be, when many evils and troubles have come upon them, that this song will testify against them as a witness; for it will not be forgotten in the mouths of their descendants, for I know the inclination of their behavior today, even before I have brought them to the land of which I swore to give them."
21 And when great disasters come down on them, this song will stand as evidence against them, for it will never be forgotten by their descendants. I know the intentions of these people, even now before they have entered the land I swore to give them."
Matthew Henry's Commentary on Deuteronomy 31:21
Commentary on Deuteronomy 31:14-22
(Read Deuteronomy 31:14-22)
Moses and Joshua attended the Divine Majesty at the door of the tabernacle. Moses is told again that he must shortly die; even those who are most ready and willing to die, need to be often reminded of its coming. The Lord tells Moses, that, after his death, the covenant he had taken so much pains to make between Israel and their God, would certainly be broken. Israel would forsake Him; then God would forsake Israel. Justly does he cast those off who so unjustly cast him off. Moses is directed to deliver them a song, which should remain a standing testimony for God, as faithful to them in giving them warning, and against them, as persons false to themselves in not taking the warning. The word of God is a discerner of the thoughts and intents of men's hearts, and meets them by reproofs and correction. Ministers who preach the word, know not the imaginations of men; but God, whose word it is, knows perfectly.