As it is written, “Behold, I am laying in Zion a stone of stumbling, and a rock of offense; and whoever believes in him will not be put to shame.”
Romans 9:33 ESV

This quote is an amalgam of Isaiah 8:14 and 28:16. The Apostles frequently paraphrased Scripture or mixed and matched passages to make a point. We often condemn today’s preachers for being so apparently cavalier with the Scriptures, but whether they are right or wrong depends heavily on context and intent.