Found an interesting article that suggests oldest written quotes from the Bible can be found on a piece of pottery Carbon dated to c1000BC… I personally don’t put a lot of stock in carbon dating, but we should be able to validate this via other methods such a layer the pot was found in, material type, etc…. Here is link and short quote:
“By decoding the inscription on a 3,000-year-old piece of pottery, an Israeli professor has concluded that parts of the bible were written hundreds of years earlier than suspected.
The pottery shard was discovered at excavations at Khirbet Qeiyafa near the Elah valley in Israel — about 18 miles west of Jerusalem. Carbon-dating places it in the 10th century BC, making the shard about 1,000 years older than the Dead Sea scrolls.
Professor Gershon Galil of the University of Haifa deciphered the ancient writing, basing his interpretation on the use of verbs and content particular to the Hebrew language.