Barnes on Jewish Tradition

Great Bishop of Geneva! : 1) Makarios · 2) Once Saved, Always Saved - True for Church, Not True for All Christians Individually · 3) Protestants - Not - Getting Around Matthew 28 Last Three Verses: John Calvin's Attempt · 4) Barnes NOT getting around Matthew 28:20 ... · 5) Since St Francis of Sales had Real Objections to Calvinism ... 6) Contra Sproul 7) Barnes on Jewish Tradition 8) If Constantine had Founded the Catholic Church ... 9) Salvation and Schrödinger's Cat Assorted retorts from yahoo boards and elsewhere : 10) ... on Apostolic Succession, both as to Reasons and Answering an Objection or Two (quora)

Albert Barnes' Notes on the Whole Bible : 2 Timothy 3
http://www.studylight.org/commentaries/bnb/2-timothy-3.html

Verse 8

Now as Jannes and Jambres withstood Moses - The names of these two men are not elsewhere mentioned in the Bible. They are supposed to have been two of the magicians who resisted Moses (Exodus 7:11, et al.), and who opposed their miracles to those of Moses and Aaron. It is not certain where the apostle obtained their names; but they are frequently mentioned by the Hebrew writers, and also by other writers; so that there can be no reasonable doubt that their names were correctly handed down by tradition. Nothing is more probable than that the names of the more distinguished magicians who attempted to imitate the miracles of Moses, would be preserved by tradition; and though they are not mentioned by Moses himself, and the Jews have told many ridiculous stories respecting them, yet this should not lead us to doubt the truth of the tradition respecting their names. A full collection of the Jewish statements in regard to them may be found in Wetstein, in loc.

They are also mentioned by Pliny, Nat. Hist. 30:7; and by Numenius, the philosopher, as quoted by Eusebius, 9:8, and Origen, against Celsus, p. 199. See Wetstein. By the rabbinical writers, they are sometimes mentioned as Egyptian magicians who opposed Moses in Egypt, and sometimes as the sons of Balaam. The more common account is, that they were the princes of the Egyptian magicians. One of the Jewish rabbins represents them as having been convinced by the miracles of Moses, and as having become converts to the Hebrew religion. There is no reason to doubt that these were in fact the leading men who opposed Moses in Egypt, by attempting to work counter-miracles. The point of the remark of the apostle here, is, that they resisted Moses by attempting to imitate his miracles, thus neutralizing the evidence that he was sent from God. In like manner, the persons here referred to, opposed the progress of the gospel by setting up a similar claim to that of the apostles; by pretending to have as much authority as they had; and by thus neutralizing the claims of the true religion, and leading off weak-minded persons from the truth. This is often the most dangerous kind of opposition that is made to religion.

...

Where did Barnes have it from that Jannes and Mambres (Barnes and the Bible of studylight have instead Jannes and Jambres) were precisely magicians of Pharao, and not other men who had resisted Moses on another occasion?

From tradition.

But the problem is he has this high regard for Jewish tradition of even rabbinical type, but not for Apostolic Tradition.

I wonder why?/HGL