Gen 22:16-18, Jn 8:56, Gal 3:16
God promised Abraham that He would multiply Abraham's seed. The seed is Christ.
Heb 6:13 For when God made promise to Abraham, because he could swear by no greater, he sware by himself, 14 Saying, Surely blessing I will bless thee, and multiplying I will multiply thee. 15 And so, after he had patiently endured, he obtained the promise.
Gen 22:16 And said, By myself have I sworn, saith the Lord, for because thou hast done this thing, and hast not withheld thy son, thine only son: 17 That in blessing I will bless thee, and in multiplying I will multiply thy seed as the stars of the heaven, and as the sand which is upon the sea shore; and thy seed shall possess the gate of his enemies; 18 And in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice.
Jn 8:56 Your father Abraham rejoiced to see my day: and he saw it, and was glad.
Gal 3:16 Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ.