Deu Deuteronomy, chapter Book of Deuteronomy, chapter 31
And it shall come to pass, when ra'ot rabbot and tzarot are befallen them, that this shirah shall testify against them as an ed (witness); for it shall not be forgotten out of the mouths of their zera; for I know their yetzer (inclination) in which they go about, even now, before I have brought them into ha'aretz which I swore.Psa 139:2