John Wesley on Galatians 3:16

Now the promises were made to Abraham and his seed - Several promises were made to Abraham; but the chief of all, and which was several times repeated, was that of the blessing through Christ. He - That is, God. Saith not, And to seeds, as of many - As if the promise were made to several kinds of seed. But as of one - That is, one kind of seed, one posterity, one kind of sons. And to all these the blessing belonged by promise. Which is Christ - including all that believe in him. Gen 22:18.