Deuteronomy 31:13

13 And their sons who have not known shall hear, and shall learn to fear the Lord thy God all the days that they live upon the land, into which ye go over Jordan to inherit it.

Deuteronomy 31:13 Meaning and Commentary

Deuteronomy 31:13

And [that] their children, which have not known [anything],
&c.] Of God and of his law and of their duty to God, to their parents, and the rest of their fellow creatures:

may hear, and learn to fear the Lord your God;
hear the law of God, learn the meaning of it, and so be brought up in the fear, nurture, and admonition of the Lord, and serve him their Creator in the days of their youth:

as long as ye live in the land whither ye go over Jordan to possess
it;
this being a means to continue the fear, service, and worship of God in their posterity, and so of their long continuance in the land of Canaan.

Deuteronomy 31:13 In-Context

11 when all Israel come together to appear before the Lord your God, in the place which the Lord shall choose, ye shall read this law before all Israel in their ears,
12 having assembled the people, the men, and the women, and the children, and the stranger that is in your cities, that they may hear, and that they may learn to fear the Lord your God; and they shall hearken to do all the words of this law.
13 And their sons who have not known shall hear, and shall learn to fear the Lord thy God all the days that they live upon the land, into which ye go over Jordan to inherit it.
14 And the Lord said to Moses, Behold, the days of thy death are at hand; call Joshua, and stand ye by the doors of the tabernacle of testimony, and I will give him a charge. And Moses and Joshua went to the tabernacle of testimony, and stood by the doors of the tabernacle of testimony.
15 And the Lord descended in a cloud, and stood by the doors of the tabernacle of testimony; and the pillar of the cloud stood by the doors of the tabernacle of testimony.

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