E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Jannes and Jambres.
The two magicians of Pharaoh, who imitated some of the miracles of Moses. The Jannes and Jambres who withstood Moses, mentioned by St. Paul (2 Tim. iii. 8, 9), are supposed to be the same. The paraphrast Jonathan says they were the sons of Balaam.