Deuteronomy 1:39

39 And every young child who this day knows not good or evil, —they shall enter therein, and to them I will give it, and they shall inherit it.

Deuteronomy 1:39 Meaning and Commentary

Deuteronomy 1:39

Moreover, your little ones, which ye said should be a prey,
&c.] To the Amorites, into whose hands they expected to be delivered, ( Deuteronomy 1:27 ) see ( Numbers 14:3 )

and your children, which in that day had no knowledge between good and
evil;
not being at years of understanding, and which is a common description of children; it is particularly expressed "in that day", for now they were the very persons Moses was directing his speech unto, and relating this history, it being thirty eight years ago when this affair was, so that now they were grown up to years of discretion:

they shall go in thither, and unto them will I give it, and they shall
possess it:
the relation of which now might serve greatly to encourage their faith, as well as it would be a fulfilment of the promise of the land made unto Abraham, Isaac, and Jacob, which was not made of none effect through the unbelief of the Israelites, whose carcasses fell in the wilderness, since their posterity was to enjoy it, and did.

Deuteronomy 1:39 In-Context

37 And the Lord was angry with me for your sake, saying, Neither shalt thou by any means enter therein.
38 Joshua the son of Naue, who stands by thee, he shall enter in there; do thou strengthen him, for he shall cause Israel to inherit it.
39 And every young child who this day knows not good or evil, —they shall enter therein, and to them I will give it, and they shall inherit it.
40 And ye turned and marched into the wilderness, in the way by the Red Sea.
41 And ye answered and said, We have sinned before the Lord our God; we will go up and fight according to all that the Lord our God has commanded us: and having taken every one his weapons of war, and being gathered together, ye went up to the mountain.

The Brenton translation of the Septuagint is in the public domain.