What are the six OT quotes in the NT, which are not from the Septuagint? I was aware that some of them were not, but it's surprising to learn (see below) that there are only six of them. And, an associated question (which may be a duplicate, sorry) is, where might I find a list of all these 200 OT quotes in the NT?
“The Septuagint was a good strong anchor for theologians and scholars to determine, what the Bible was really like in apostolic times” the Rev. Dr. Gordon Walker, an emeritus priest at St. Ignatius Antiochian Orthodox Church in Madison, Tenn. said in a telephone interview. “In the New Testament, all but six of the Old Testament quotes that were used, came from the Septuagint.” New Testament writers quoted Scripture more than 200 times, he said. The other six references were taken from Aramaic and Hebrew texts available at the time. (Vicksburg Post - Vicksburg, MS)
Note: Looking among the many related posts, I found this information from a participant called "Zenon." Below is my attempt to link you to the site where Zenon says "This website" ... hopefully, this works
This website provides an exhaustive list of instances where the NT quotes the OT. It gives the passages side-by-side from the NT, the Septuagint, and the Masoretic. Some are virtually identical between the texts; others vary rather significantly.