Galatians 3:14-16

14 so that through Christ Jesus the blessing of Abraham could come to the foreigners as well, and we could receive the promise of the Spirit by trusting God.

15 Brothers and sisters, here's an example from daily life. If a contract is drawn up and agreed, signed and sealed, nobody can ignore it or add to it.

16 Now the promises were given to Abraham, and to his son.[22] It doesn't say, “sons” as if plural, but singular: “and to your son,” meaning Christ.