The "Abomination of Desolation" comes from the description in Daniel of Antiochus Epiphanus' desecration of the Temple.

Some post-Pauline source used it as an analogy for the Temple's desecration in 70 C.E.

However, Paul's epistles, in fact none of the epistles, display any anticipation of those things which would occur in 70 C.E.

Accordingly, those writers display no awareness of any such predictions on Jesus' part.

So it appears that all the predictions, attributed to Jesus, of those events, originated with authors later than any of those who wrote the epistles. Those predictions did not come from Paul, and certainly not from Jesus.

I'm not well acquainted with the "man of Sin." Such a figure may well have been postulated in, say, the Essene writings, or those of other pre-Christian gnostic Jews.

P.

‎‎חֲזַק וֶאֱמָץ
אַֽל־תַּעֲרֹץ וְאַל־תֵּחָת
כִּי עִמְּךָ יְהוָה אֱלֹהֶיךָ בְּכֹל אֲשֶׁר תֵּלֵֽךְ׃