Deuteronomy 11:21

21 that your days may be multiplied, and the days of your children, upon the land which the LORD swore unto your fathers to give them, as the days of the heavens upon the earth.

Deuteronomy 11:21 Meaning and Commentary

Deuteronomy 11:21

That your days may be multiplied
Long life being a very desirable blessing, and which is promised to those that obey and keep the law; see ( Deuteronomy 30:19 Deuteronomy 30:20 ) ( Psalms 91:16 )

and the days of your children;
which are dear to parents, and the continuance of whose lives, next to their own, is most desirable, yea, as desirable as their own; and especially it is desirable that they might have a posterity descending from them, to enjoy for ever their estates and possessions; as it was to the people of Israel, that they might have a seed always to dwell

in the land which the Lord sware unto your fathers to give them;
the land of Canaan, so often spoken of as the promise, oath, and gift of God:

as the days of heaven upon the earth;
that is, as long as the heavens and the earth shall be, and the one shall be over the other, as they will be to the end of time.

Deuteronomy 11:21 In-Context

19 And ye shall teach them to your children that ye may think of them sitting in thy house and walking by the way, lying down in bed, and rising up.
20 And thou shalt write them upon the door posts of thine house and upon thy gates
21 that your days may be multiplied, and the days of your children, upon the land which the LORD swore unto your fathers to give them, as the days of the heavens upon the earth.
22 For if ye shall diligently keep all these commandments which I command you, to do them, loving the LORD your God and walking in all his ways, to cleave unto him,
23 then the LORD will drive out all these Gentiles from before you, and ye shall possess nations greater and mightier than yourselves.
The Jubilee Bible (from the Scriptures of the Reformation), edited by Russell M. Stendal, Copyright © 2000, 2001, 2010