Genesis 28:3-4

And God Almighty bless thee, and make thee fruitful, and multiply thee, that thou mayest be a multitude of people; And give thee the blessing of Abraham, to thee, and to thy seed with thee; that thou mayest inherit the land wherein thou art a stranger, which God gave unto Abraham.

Two great promises Abraham was blessed with, and Isaac here entails them both upon Jacob. (1.) The promise of heirs, God make thee fruitful and multiply thee1. Through his loins that people should descend from Abraham which should be numerous as the stars of heaven2. Through his loins should descend from Abraham that person in whom all the families of the earth should be blessed. (2.) The promise of an inheritance for those heirs, Genesis 28:4.

That thou mayest inherit the land of thy sojournings — (So the Hebrew) Canaan was hereby entailed upon the seed of Jacob, exclusive of the seed of Esau. Isaac was now sending Jacob away into a distant country to settle there for some time; and lest this should look like disinheriting him, he here confirms the settlement of it upon him. This promise looks as high as heaven, of which Canaan was a type. That was the better country which Jacob, with the other patriarchs, had in his eye when he confessed himself a stranger and pilgrim on the earth, Hebrews 11:16.