A.T. Robertson 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)

Paul repeats the phrase just used in the whole quotation from Isa 8:14 with the same idea in "a rock of offence" (πετραν σκανδαλου, "a rock of snare," a rock which the Jews made a cause of stumbling). The rest of the verse is quoted from Isa 28:16. However, the Hebrew means "shall not make haste" rather than "shall not be put to shame." In 1 Peter 2:8 we have the same use of these Scriptures about Christ. Either Peter had read Romans or both Paul and Peter had a copy of Christian Testimonia like Cyprian's later.