Galatians 4:1

4:1 Now I mean that the heir, as long as he is a minor, is no different from a slave, though he is the owner of everything.

Galatians 3:16

3:16 Now the promises were spoken to Abraham and to his descendant. Scripture does not say, “and to the descendants,” referring to many, but “and to your descendant,” referring to one, who is Christ.