Charles Ellicott Commentary Romans 9:33

"even as it is written, Behold, I lay in Zion a stone of stumbling and a rock of offence: And he that believeth on him shall not be put to shame." — Romans 9:33 (ASV)

Behold, I lay in Zion.—This is 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 divine faithfulness; in the second, to God Himself. St. Paul, like the Jewish Rabbis, applied both passages to the Messiah—not wrongly, for they foretold the triumph of the theocracy, which was fulfilled in the Messiah. The same two quotations appear in 1 Peter 2:6–7, and with similar variation from the Septuagint, but they are there kept distinct.

Shall not be ashamed.—The Septuagint also has this reading. The Hebrew is, "Shall not make haste."