in Isaac shall thy seed be called
God Swore Oath to Abraham
Genesis 26:2 (KJV) And the Lord appeared unto him, and said, Go not down into Egypt; dwell in the land which I shall tell thee of:
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;
4 And I will make thy seed to multiply as the stars of heaven, and will give unto thy seed all these countries; and in thy seed shall all the nations of the earth be blessed;
5 Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.
Hebrews 11:18 Of whom it was said, That in Isaac shall thy seed be called:
Everlasting Covenant Through Offspring From Isaac
Genesis 17:19 And (KJV) God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.
Romans 9:7 Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called.