"You are My Son": בְּנִי אַתָּה (Ps 2:7)

Says Ps 2:7 reads בְּנִי אַתָּה אֲנִי הַיּוֹם יְלִדְתִּיךָ (beni attah ani hayyom yelidtikha, "You are My Son; today I have become Your Father," BSB). בְּנִי is a noun with the 1cs suffix, and יְלִדְתִּיךָ is Qal perfect 1cs with a 2ms suffix (OSHB HVqp1cs/Sp2ms). The words are a חֹק (khoq, "decree") of YHWH to the king he has installed on Zion (2:6), his anointed (2:2). Swete's LXX has Υἱός μου εἶ σύ, ἐγὼ σήμερον γεγέννηκά σε.

Implies Ps 2 applies the father–son language of 2 Sam 7:14 to the Davidic king at his enthronement. "Today" marks the day of installation.

Implies Rom 1:4 says the Son was τοῦ ὁρισθέντος υἱοῦ θεοῦ ἐν δυνάμει ("declared … Son of God in power") by the resurrection. That fits Ps 2:7's enthronement setting. In Acts 13:33 Paul applies Ps 2:7 to the resurrection. Romans does not quote the psalm.

Implies The verse does not teach that Jesus became the Son at the resurrection. Rom 1:3 already names him τοῦ υἱοῦ αὐτοῦ ("his Son") before the clause about his human descent. Rom 1:4 concerns the Son's installation "in power," not his origin. The royal "begetting" of Ps 2 is enthronement language, and the eternal sonship rests on texts such as John 1:1–18. The Greek Scholar handles ὁρίζω.