Being a Catholic, do you really want to go into things which are not found in the Bible.
No one has said it was found in the Bible, it a Belief, I'm sure you will understand the word Dogma as applied to the concept of Sola Scriptura, because the Trinity isn't mentioned either BUT, Catholics believe in the Trinity don't they?
OK lets take a very close look at 2 Th. 2:15. Using the Dreaded Sola Scriptura, for this is what Sola Scriptura is all about, clarifying just what the Bible does say, by using the Bible to actually do the clarifying, lets see what we find.
2 Th 2:15
Therefore, brethren, stand fast, and hold the (TRADITIONS) which ye have been taught, whether by word, or our epistle.
Here is your word.
TRADITIONS:
G3862
παράδοσις
paradosis
par-ad'-os-is
Transmission, that is, (concretely) a precept; specifically the Jewish traditionary law: - ordinance, tradition.
To begin with, what Paul said was,
"stand fast, and hold the (TRADITIONS) which ye have been taught, whether by word, or our epistle.
Notice, the first word in the Definition, (TRANSMISSION) then notice, what Paul said the mode of Transmission for these Traditions was, (They were either spoken or written) notice, it does not say how many times these Traditions were written or spoken, nor does it say how long ago these Traditions were
written or spoken, therefore we can conclude what Paul said, which would fall into the category of (Tradition-s) could have been either written or spoken by him 2 days before. (Do you agree with that Conclusion)?
Next, in BLUE notice it says "(concretely) a precept;" then it says in RED,
"specifically the Jewish traditionary law:" then again in RED it tells us what constitutes the Jewish Traditionary Law, which would be,
ordinance, tradition.
Now in order to keep things clear and leaving no room for Misunderstanding.
I have used both Greek and Hebrew, in order to alleviate any ambiguity.
To words, (ORDINANCE, TRADITION)
ORDINANCE:
GREEK:
G1296
διαταγή
diatagē
dee-at-ag-ay'
From G1299; arrangement, that is, institution: - instrumentality.
G1299
διατάσσω
diatassō
dee-at-as'-so
To arrange thoroughly, that is, (specifically) institute, prescribe, etc.: - appoint, command, give, (set in) order, ordain.
ORDINANCE:
HEBREW:
H2706
חֹק
chôq
khoke
An enactment; hence an appointment (of time, space, quantity, labor or usage): - appointed, bound, commandment, convenient, custom, decree (-d), due, law, measure, X necessary, ordinance (-nary), portion, set time, statute, task.
H2708
חֻקָּה
chûqqâh
khook-kaw'
Feminine of H2706, and meaning substantially the same: - appointed, custom, manner, ordinance, site, statute.
TRADITION:
I was going to post the definitions of the word TRADITIONS in the Hebrew, but upon looking, Both of these words were not used in the Old Testament.
Therefore I believe we are able to conclude, Paul was not speaking about the Traditions of the Jews when he wrote his second Epistle to the Thessalonians.
So then what Traditions was Paul speaking about?
Now knowing what Ordinance, and Tradition(s) mean, lets shift our attention to the last word found in the Definition of the word Tradition(s) that word being (PRECEPT).
The word Precept is found in the New Testament 2 times, both times the word is in reference to Moses and his giving of the Law to the People (Nation).
PRECEPT:
GREEK:
G1785
ἐντολή
entolē
en-tol-ay'
From G1781; injunction, that is, an authoritative prescription: - commandment, precept.
G1781
ἐντέλλομαι
entellomai
en-tel'-lom-ahee
To enjoin: - (give) charge, (give) command(-ments), injoin.
PRECEPT:
HEBREW:
H6673
צָו צַו
tsav tsâv
tsav, tsawv
From H6680; an injunction: - commandment, precept.
H6680
צָוָה
tsâvâh
tsaw-vaw'
A primitive root; (intensively) to constitute, enjoin: - appoint, (for-) bid. (give a) charge, (give a, give in, send with) command (-er, ment), send a messenger, put, (set) in order.
Therefore the Traditions spoken of by Paul were the Commandments of Our Lord.
What other Traditions do you suppose Paul was speaking of?
Was he telling the Thessalonians, to keep "The Traditions of the Catholic Church" before the Catholic Church had even come into being through Constantine?