Romans 3:30 - Coke's Commentary on the Holy Bible

Seeing it is one God, &c.— So that it is one God, the same eternal and unchangeable Jehovah, who will justify, &c. Mr. Locke would render it, seeing God is one; and suppose it an allusion to the prediction, Zechariah 14:9 that the Lord shall be One, and his name One,—fulfilled by the publication of the Gospel: but the allusion appears far-fetched. The Apostle, having asserted that God is the God of the Gentiles, as well as of the Jews, goes on to observe that there is but one God, whose tender mercies are over all his works; and with whom there is no acceptance of persons. See chap. Romans 2:11.