Deuteronomy 32:47

45 And Moses made an end of speaking all these words to all Israel:

46 And he said unto them, Set your hearts unto all the words which I testify among you this day, which ye shall command your children to observe to do, all the words of this law.

For it is not a vain thing for you; because it is your life: and through this thing ye shall prolong your days in the land, whither ye go over Jordan to possess it.

48 And the LORD spake unto Moses that selfsame day, saying,

49 Get thee up into this mountain Abarim, unto mount Nebo, which is in the land of Moab, that is over against Jericho; and behold the land of Canaan, which I give unto the children of Israel for a possession:

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
For they are not idle words to you, because they are your life, and by them you will live long in the land that you are crossing the Jordan to possess.”
KJV
For it is not a vain thing for you; because it is your life: and through this thing ye shall prolong your days in the land, whither ye go over Jordan to possess it.
WEB
For it is no vain thing for you, because it is your life, and through this thing you shall prolong your days in the land, where you go over the Jordan to possess it.”
ASV
For it is no vain thing for you; because it is your life, and through this thing ye shall prolong your days in the land, whither ye go over the Jordan to possess it.
DARBY
For it is no vain word for you, but it is your life, and through this word ye shall prolong your days on the land whereunto ye pass over the Jordan to possess it.
BLB
For it [is] not a futile thing for you⁺, because it [is] your⁺ life, and by this word you⁺ shall prolong days in the land that there you⁺ are passing over the Jordan to possess it.”
ÅB
For dette er ikke noe tomt ord for dere, men det er deres liv, og ved dette ord skal dere leve lenge i det land dere nå drar til over Jordan og skal ta i eie.
OTB
For det er ikke et tomt ord for dere, men deres liv, og ved dette ordet skal dere leve lenge i det landet som dere krysser Jordan for å eie.”
B1930
For dette er ikke noget tomt ord for eder, men det er eders liv, og ved dette ord skal I leve lenge i det land I nu drar til over Jordan og skal ta i eie.

Study notes (Tyndale)

Original text and word study

Cross references