Deuteronomy 6:3

3 Hear, therefore, O Israel, and observe to do them, that it may be well with thee, and that ye may be greatly multiplied, as the Lord God of thy fathers said that he would give thee a land flowing with milk and honey: and these the ordinances, and the judgments, which the Lord commanded the children of Israel in the wilderness, when they had gone forth from the land of Egypt.

Deuteronomy 6:3 Meaning and Commentary

Deuteronomy 6:3

Hear therefore, O Israel, and observe to do it
Or them, the commandments given them:

that it may be well with thee;
in body and estate:

and that ye may increase mightily;
not only in wealth and riches, but chiefly in numbers:

as the Lord God of thy fathers hath promised thee;
a promise of increase of numbers was frequently made to Abraham, Isaac, and Jacob; as that their seed should be as the stars of heaven, and as the dust of the earth, and the sand on the sea shore, innumerable; see ( Genesis 15:5 ) ( 22:17 ) ( 25:4 ) ( 28:14 ) and this especially

in the land that floweth with milk and honey;
a very common periphrasis of the land of Canaan, because of the plenty of good things in it; see ( Exodus 3:8 ) .

Deuteronomy 6:3 In-Context

1 And these the commands, and the ordinances, and the judgments, as many as the Lord our God gave commandment to teach you to do so in the land on which ye enter to inherit it.
2 That ye may fear the Lord your God, keep ye all his ordinances, and his commandments, which I command thee to-day, thou, and thy sons, and thy sons' sons, all the days of thy life, that ye may live many days.
3 Hear, therefore, O Israel, and observe to do them, that it may be well with thee, and that ye may be greatly multiplied, as the Lord God of thy fathers said that he would give thee a land flowing with milk and honey: and these the ordinances, and the judgments, which the Lord commanded the children of Israel in the wilderness, when they had gone forth from the land of Egypt.
4 Hear, O Israel, The Lord our God is one Lord.
5 And thou shalt love the Lord thy God with all thy mind, and with all thy soul, and all thy strength.

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