SEV Biblia, Chapter 31:21
Y será que cuando le vinieren muchos males y angustias, entonces este cántico responderá en su cara por testigo, que no será olvidada de la boca de su simiente; porque yo conozco su ingenio, y lo que hace hoy antes que le introduzca en la tierra que juré.
Clarke's Bible Commentary - Deuteronomy 31:21
Verse 21. This song shall testify against them] Because in it their general defection is predicted, but in such a way as to show them how to avoid the evil; and if they did not avoid the evil, and the threatened punishment should come upon them, then the song should testify against them, by showing that they had been sufficiently warned, and might have lived to God, and so escaped those disasters.
John Gill's Bible Commentary
Ver. 21. And it shall come to pass, when many evils and troubles are befallen them , etc.] As did in the times of the judges, in the Babylonish captivity, and do now in their present exile: that this song shall testify against them as a witness ; which so clearly points at their sins, with all their aggravated circumstances, and describes so fully their calamities, distresses, and punishment for them: for it shall not be forgotten out of the mouths of their seed ; which shows that it respects time to come, their later posterity, whose memory of this song would be conjured up by the evils that should come upon them for their sins; nor is it forgotten by them to this day, who acknowledge there are some things in it now fulfilled or fulfilling in them: for I know their imagination which they go about even now : or are “making” f564 ; forming and framing within themselves, there being a secret inclination in their minds to idolatry, which were working and contriving schemes to bring it about, and set it up; and this, God, the searcher of hearts, knew full well, and that in process of time this evil imagination would break forth into act, in an open and flagrant manner: before I have brought thee into the land which I sware ; to their fathers, to give it to them for an inheritance, as is suggested in ( Deuteronomy 31:20).
Matthew Henry Commentary
Verses 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 thos who are most ready and willing to die, need to be often reminded of it coming. The Lord tells Moses, that, after his death, the covenant he had taken so much pains to make between Israel and their God, woul certainly be broken. Israel would forsake Him; then God would forsak Israel. Justly does he cast those off who so unjustly cast him off Moses is directed to deliver them a song, which should remain 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 wh preach the word, know not the imaginations of men; but God, whose wor it is, knows perfectly.
Original Hebrew
והיה 1961 כי 3588 תמצאן 4672 אתו 853 רעות 7451 רבות 7227 וצרות 6869 וענתה 6030 השׁירה 7892 הזאת 2063 לפניו 6440 לעד 5707 כי 3588 לא 3808 תשׁכח 7911 מפי 6310 זרעו 2233 כי 3588 ידעתי 3045 את 853 יצרו 3336 אשׁר 834 הוא 1931 עשׂה 6213 היום 3117 בטרם 2962 אביאנו 935 אל 413 הארץ 776 אשׁר 834 נשׁבעתי׃ 7650