Unto thee, and unto thy seed; to thee to enjoy for thy present comfort, and to them to possess as an inheritance. See Poole on "Genesis 13:15", See Poole on "Genesis 15:18". I will perform the oath, i.e. the promises confirmed by oath, Genesis 22:16, &c.
Related Commentaries of Genesis 26:3
Genesis 26:3
3 Sojourn in this land, and I will be with thee, and will bless thee; for unto thee, and unto thy seed, I will give all these countries, and I will perform the oath which I sware unto Abraham thy father;