The Apostle Paul
Romans 11:7BSB·traditional attribution

What then? What Israel was seeking, it failed to obtain, but the elect did. The others were hardened,

John Calvin Reformed @genevareformer

7. What then? What Israel seeks, etc. As he is here engaged on a difficult subject, he asks a question, as though he was in doubt. He intended, however, by expressing this doubt, to render the answer, which immediately follows, more evident; for he intimates, that no other can be given; and the answer is, — that Israel in vain labored to seek salvation, because his attempt was absurd.

Matthew Henry Presbyterian @wholebiblehenry

The apostle proposes here a plausible objection, which might be urged against the divine conduct in casting off the Jewish nation (Rom 11:1): "Hath God cast away his people? Is the rejection total and final? Are they all abandoned to wrath and ruin, and that eternal?

Commenting on Romans 11:1-32

John Gill Reformed Baptist @doctorgill

What then?.... What can be said to the point the apostle is upon? it is as clear as the sun, out of all question, that God has not cast away all the people of the Jews, nor any whom he foreknew, any age or period of time; neither in the time Elijah, nor in the apostle's, he always having a reserve of some for himself...