Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ.
The promises were spoken to Abraham and to his seed. Scripture does not say and to seeds, meaning many people, but and to your seed, meaning one person, who is Christ.
Τῷ δὲ Ἀβραὰμ ἐρρήθησαν αἱ ἐπαγγελίαι, καὶ τῷ σπέρματι αὐτοῦ. Οὐ λέγει, Καὶ τοῖς σπέρμασιν, ὡς ἐπὶ πολλῶν, ἀλλ' ὡς ἐφ' ἑνός, Καὶ τῷ σπέρματί σου, ὅς ἐστιν Χριστός.
Tō de Abraam errēthēsan ai epaggeliai, kai tō spermati aytoy. Oy legei, Kai tois spermasin, ōs epi pollōn, all' ōs eph' enos, Kai tō spermati soy, os estin Christos.