Charles Spurgeon Commentary Romans 10:17-19

"So belief [cometh] of hearing, and hearing by the word of Christ. But I say, Did they not hear? Yea, verily, Their sound went out into all the earth, And their words unto the ends of the world. But I say, Did Israel not know? First Moses saith, I will provoke you to jealousy with that which is no nation, With a nation void of understanding will I anger you." — Romans 10:17-19 (ASV)

So then faith cometh by hearing, and hearing by the word of God. But I say, Have they not heard? Yes, verily, their sound went into all the earth, and their words unto the ends of the world. But I say, Did not Israel know?

Did not the Jewish people have a time of hearing and instruction? Certainly they knew, and they knew also that the gospel was not to be confined to them. They had a warning that it should even be taken from them and sent to other nations.