Ellicott's Commentary for English Readers - Romans 9:33
(33) Behold, I lay in Sion.—A free combination of Isaiah 28:16—“Behold, I lay in Zion for a foundation a stone; . . . he that believeth shall not make haste”—and Isaiah 8:14, “And He shall be . . . for a stone of stumbling and for a rock of offence to both the houses of Israel.” In the first of these passages the prophet refers to the foundation-stone of the Temple as a symbol of the divine faithfulness; in the second to God Himself. St. Paul, like the Jewish Rabbis, applied both passages to... read more
Ellicott's Commentary for English Readers - Romans 9:32
(32) For they stumbled.—“For,” in this clause, should be omitted, and the two clauses thrown together, the words “of the law” also going out—Because (seeking righteousness), not of faith, but as if of works, they stumbled, &c.That stumblingstone.—Christ. When Christianity, with the justification by faith which goes with it, was offered to them, they “were offended,” and refused it. read more