21 that your days may be multiplied, and the days of your children, in the land which Yahweh swore to your fathers to give them, as the days of the heavens above the earth.
*Minor differences ignored. Grouped by changes, with first version listed as example.
The sense is: "Keep the covenant faithfully, and so shall your own and your children's days be multiplied as long as the heaven covers the earth." The promise of Canaan to Israel was thus a perpetual promise, but also a conditional one.
That your days may be multiplied, and the days of your children, in the land which the LORD sware unto your fathers to give them, as (g) the days of heaven upon the earth.
(g) As long as the heavens and earth endure, (2-Peter 3:10, 2-Peter 3:12).
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.
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.
As the days of heaven - As long as the heaven keeps its place and continues its influences upon earth.
*More commentary available at chapter level.