Charles Ellicott Commentary Romans 9:29

"And, as Isaiah hath said before, Except the Lord of Sabaoth had left us a seed, We had become as Sodom, and had been made like unto Gomorrah." — Romans 9:29 (ASV)

Said before—i.e., in an earlier part of his book. The Book of Isaiah was at that time collected in the form in which we have it. In Acts 13:33, we find an express reference to the present numbering of the Psalms—It is also written in the second psalm, Thou art my Son, this day have I begotten thee. (Some authorities read “first,” the two psalms being arranged as one, but “second” is probably the true reading.)

A seed.—Equivalent to the remnant of Romans 9:27. The point of the quotation is that, but for this remnant, the rejection of Israel would have been utter and complete.