Deuteronomy 6:3

Hear, therefore, O Israel, and observe to do it, that it may be well with thee, and that ye may increase mightily, as the Lord God of thy fathers hath promised thee, Genesis 15:5, in the land that floweth with milk and honey. There are three promises included in this statement: That God would surely bring the children of Israel into the land of Canaan, that they would there enjoy the rich prosperity which the fertility of the land assured, and that they would increase greatly in numbers, as the Lord had said to Abraham. Moses now formally pronounces the first and most important command, the summary of all the other commandments.