Devarim 11:21

21 That your yamim may be multiplied, and the yamim of your banim, in ha’adamah which Hashem swore unto Avoteichem to give them, as the yamim of Shomayim upon ha’aretz (i.e., as long as the heavens are above the earth).

Devarim 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.

Devarim 11:21 In-Context

19 And ye shall teach them your banim, speaking of them when thou sittest in thine bais, and when thou walkest by the way, when thou liest down, and when thou risest up.

20 And thou shalt write them upon the mezuzot of thine bais, and upon thy she’arim;

21 That your yamim may be multiplied, and the yamim of your banim, in ha’adamah which Hashem swore unto Avoteichem to give them, as the yamim of Shomayim upon ha’aretz (i.e., as long as the heavens are above the earth).

22 For if ye shall be shomer diligently over all these mitzvot which I command you, to do them, to love Hashem Eloheichem, to walk in all His ways, and to have deveykus unto Him;

23 Then will Hashem drive out all these Goyim from before you, and ye shall possess Goyim gedolim and mightier than yourselves.