DEU 31:21

21 And they will experience many terrible disasters. After that happens, their descendants will never forget this song, and it will be like a witness [that says, ‘Now you know why Yahweh punished your ancestors].’ I will soon take them into the land that I vowed that I would give to them; but now, before I do that, I know what they are thinking [that they will do when they are living there].”