'Everlasting Possession' in the Bible

And I will give unto thee, and to thy seed after thee, the land wherein thou art a stranger: even all the land of Canaan, for an everlasting possession, and will be their God."

and said unto me, "Behold, I will make thee grow and will multiply thee, and will make a great number of people of thee, and will give this land unto thee, and unto thy seed after thee, unto an everlasting possession.