Romans 11:1

The apostle having shown, in the end of the foregoing chapter, that the Jews were for their obstinacy rejected, and the Gentiles called, he here prevents or answers an objection. Some might be ready to say: If this be so, then God hath cast away his covenant people, which he hath promised not to do; see Psalms 94:14. To this he answers, first, by his accustomed form of denial: God forbid; and then he proceeds to show, that the rejection of the Jews was neither total nor final. That it was not total, he proves, first, by a particular instance in the following words.

I also am an Israelite; i.e. I am a Jew by descent, of the seed of Abraham according to the flesh, and yet am not cast off by God.

Of the tribe of Benjamin: some think this is added to intimate, that he was born of an honourable tribe, out of which king Saul sprang, 1 Samuel 9:1, and Esther the queen, Esther 2:5. Others think this is added for a contrary reason; lest his calling should be ascribed to the dignity of his tribe, he says, he was of Benjamin, the last and least of all the tribes. And others rather think, that this particular recital of his genealogy is only to show, that he was a Jew by nature and nation, and not a proselyte converted to the faith: see Philippians 3:5.