Galatians 3:14-16

14 so that the blessing of Abraham might be to the nations in Jesus Christ, and that we might receive the promise of the Spirit through faith.

15 Brothers, I speak according to man, a covenant having been ratified, even [among] mankind, no one sets aside or adds to [it].

16 And to Abraham and to his Seed the promises were spoken. It does not say, And to seeds, as of many; but as of one, And to your Seed, which is Christ.