There are 320 Greek New Testament direct quotations passages from the Hebrew Scriptures. According to a listing published by Westcott and Hort, the combined total of quotations and references is some 890. (The New Testament in the Original Greek, Graz, 1974, Vol. I, pp. 581-595)
How Are We to Understand the New Testament Author’s use of the Old Testament?
The New Testament has 320 direct quotations from the Old Testament, but the combined total of quotations and references is about 890.