Galatians 3:14-16

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

15Brethren, (I speak according to man,) even man's confirmed covenant no one sets aside, or adds other dispositions to.

16But to Abraham were the promises addressed, and to his seed: he does not say, And to seeds, as of many; but as of one, And to thy seed; which is Christ.