Hab 2:4 in Rom 1:17: Paul, LXX (Swete), MT, and Heb 10:38

Paul (SBLGNT): Ὁ δὲ δίκαιος ἐκ πίστεως ζήσεται, with no pronoun. Gal 3:11 has the same without δέ.

LXX (Swete, vol. 3, p. 59; checked against the printed page (scan)): ὁ δὲ δίκαιος ἐκ πίστεώς μου ζήσεται, "by my faithfulness." Apparatus: "δικαιος] + μου A." Swete records nothing at μου for ℵ or Q, and no C.

MT (OSHB): וְצַדִּיק בֶּאֱמוּנָתוֹ יִחְיֶה (vetsaddiq be'emunato yikhyeh). OSHB morphology: וְצַדִּיק, conjunction and adjective (HC/Aamsa); בֶּאֱמוּנָתוֹ, preposition, noun, 3ms suffix (HR/Ncfsc/Sp3ms); יִחְיֶה, Qal imperfect 3ms (HVqi3ms).

Heb 10:38: SBLGNT (with WH, Treg and NA28) has ὁ δὲ δίκαιός μου ἐκ πίστεως ζήσεται (μου after δίκαιος, as in A). RP2018 and TR have no μου.

Says The 3ms suffix agrees with צַדִּיק, the nearest masculine singular noun and subject of יִחְיֶה. Paul matches neither "his" (MT) nor "my" (LXX).

Says אֱמוּנָה means steadiness or faithfulness (BDB p. 53; Exod 17:12, Moses' hands אֱמוּנָה, "steady").

Implies The suffix most likely refers to the righteous one. The root אמן also gives וְהֶאֱמִן, "he believed" (Gen 15:6), paired with Hab 2:4 in Gal 3:6–11; πίστις covers trust and steadfastness, and Paul brings out trust in God's word without denying perseverance.

Uncertain The suffix could refer to the vision (חָזוֹן, 2:2–3: "by its reliability"), ranked well below the righteous one; God is very unlikely, as the speaker in 2:2–5 ("his" would be "my"). ἐκ πίστεως may go with ὁ δίκαιος or with ζήσεται.

8ḤevXIIgr (Tov, DJD VIII) is by reference only. Not yet checked against a page scan.