Talmai — Addition F 10: Adar 14-15 established forever as days of joyful assembly for Israel.
Licence: English and apparatus CC BY 4.0 (Talmai, Wroot Press); Greek from Swete, CC BY-SA. https://talmai.wrootpress.com/rights/
Canonical: https://talmai.wrootpress.com/unit/esth-plus-10.03-10/
Source edition: H. B. Swete, The Old Testament in Greek, 19.10.1-10

GREEK: καὶ ἔσονται αὐτοῖς αἱ ἡμέραι αὗται ἐν μηνὶ Ἀδάρ, τῇ τεσσαρεσκαιδεκάτῃ καὶ τῇ πεντεκαιδεκάτῃ τοῦ αὐτοῦ μηνός, μετὰ συναγωγῆς καὶ χαρᾶς καὶ εὐφροσύνης ἐνώπιον τοῦ θεοῦ κατὰ γενεὰς εἰς τὸν αἰῶνα ἐν τῷ λαῷ αὐτοῦ Ἰσραήλ.
ENGLISH (draft-awaiting-approval): So these days shall be for them, in the month of Adar, on the fourteenth and fifteenth of that month, with assembly and joy and gladness before God, throughout the generations forever, among his people Israel.

PARALLELS:
- [Motif] Megillah 14a:4 (Bavli Megillah 9a-17a) — conduit: oral. The Megillah's reading as the one perpetual addition beyond Torah matches the plus's establishment of Adar 14-15 'throughout the generations forever.'
- [Motif] Rashi on Megillah 17a:12:2 (Rashi on Bavli Megillah 9a-17a) — conduit: oral. 'It is impossible for the fifteenth to precede the fourteenth' fixes the identical ordered pair of dates -- Adar 14 and 15 -- Addition F establishes.
- [Motif] Rashi on Megillah 10b:2:1 (Rashi on Bavli Megillah 9a-17a) — conduit: oral. Listing the fifteenth of Adar among the walled-city obligations is specifically the second of Addition F's two established days.
- [Motif] Aramaic Targum to Esther 9:27 (Aramaic Targum to Esther (Targum Rishon)) — conduit: Aramaic. Reading the scroll in synagogues is a specific, non-MT rabbinic institution giving concrete content to the plus's 'assembly' attached to the two days.
- [Flagged] Sifrei Aggadah on Esther, Midrash Panim Acherim, Version I 1:17 (Sifrei Aggadah on Esther: Midrash Panim Acherim, Version I) — conduit: lost intermediary. The midrash insists this deliverance, unlike the first redemption from Egypt, 'will have no cessation forever' -- matching Addition F's specific claim that the Adar days stand 'throughout the generations, forever,' a shared distinctive permanence claim about Purim specifically (not the Exodus generally).