Hello Bill,
I’ve been discussing points from the New Testament that show things written that could have only been learned through oral tradition. The verse you chose is one of them. Below, are two more examples, written by St. Paul.
**1Co 10:4 And all drank the same spiritual drink: (And they drank of the spiritual rock that followed them: and the rock was Christ.) **
How did St. Paul know about the rock that followed the Israelites through the desert? It was not written about anywhere else in scriptures, including the Old Testament! St. Paul could have only learned that through, oral tradition.
2Ti 3:8 Now as Jannes and Mambres resisted Moses, so these also resist the truth, men corrupted in mind, reprobate concerning the faith.
Remember the story of Pharoah’s magicians? You know they turned their staffs into snakes and Moses staff/snake ate them both. How did St. Paul know their names? They are not named anywhere else in the Bible! St. Paul could have only learned this through, oral tradtion.