romans 9:29 And as Esaias said before, Except the Lord of Sabaoth had left us a seed, we had been as Sodoma, and been made like unto Gomorrha. - Free Bible Online

      29. And as Esaias said--"hath said"
      before--that is, probably in an earlier part of his book, namely, Isa 1:9.
      Except the Lord of Sabaoth--that is, "The Lord of Hosts": the word is Hebrew, but occurs so in the Epistle of James (Jas 5:4), and has thence become naturalized in our Christian phraseology.
      had left us a seed--meaning a "remnant"; small at first, but in due time to be a seed of plenty (compare Ps 22:30, 31; Isa 6:12, 13).
      we had been--"become"
      as Sodom, &c.--But for this precious seed, the chosen people would have resembled the cities of the plain, both in degeneracy of character and in merited doom.

JFB.