Deuteronomy 32:46-48

46 he said to them, “Take to heart all the words of my testimony against you today, so that you can use them in charging your children to be careful to obey all the words of this Torah.

47 For this is not a trivial matter for you; on the contrary, it is your life! Through it you will live long in the land you are crossing the Yarden to possess.”

48 [47] (Maftir) That same day ADONAI said to Moshe,