“That you do not credit him but claim that it is from the Bible does not change that this teaching is Luther’s invention”
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Robert Bellarmine listed eight earlier authors who used sola (Disputatio de controversiis: De justificatione 1.25 [Naples: G. Giuliano, 1856], 4.501-3):
Origen, Commentarius in Ep. ad Romanos, cap. 3 (PG 14.952).
Hilary, Commentarius in Matthaeum 8:6 (PL 9.961).
Basil, Hom. de humilitate 20.3 (PG 31.529C).
Ambrosiaster, In Ep. ad Romanos 3.24 (CSEL 81.1.119): sola fide justificati sunt dono Dei, through faith alone they have been justified by a gift of God; 4.5 (CSEL 81.1.130).
John Chrysostom, Hom. in Ep. ad Titum 3.3 (PG 62.679 [not in Greek text]).
Cyril of Alexandria, In Joannis Evangelium 10.15.7 (PG 74.368 [but alludes to Jas 2:19]).
Bernard, In Canticum serm. 22.8 (PL 183.881): solam justificatur per fidem, is justified by faith alone.
Theophylact, Expositio in ep. ad Galatas 3.12-13 (PG 124.988).
Theodoret, Affectionum curatio 7 (PG 93.100; ed. J. Raeder [Teubner], 189.20-24).
Thomas Aquinas, Expositio in Ep. I ad Timotheum cap. 1, lect. 3 (Parma ed., 13.588): Non est ergo in eis [moralibus et caeremonialibus legis] spes iustificationis, sed in sola fide, Rom. 3:28 [Open in Logos Bible Software (if available)] : Arbitramur justificari hominem per fidem, sine operibus legis (Therefore the hope of justification is not found in them [the moral and ceremonial requirements of the law], but in faith alone, Rom 3:28 [Open in Logos Bible Software (if available)] : We consider a human being to be justified by faith, without the works of the law). Cf. In ep. ad Romanos 4.1 (Parma ed., 13.42a): reputabitur fides eius, scilicet sola sine operibus exterioribus, ad iustitiam; In ep. ad Galatas 2.4 (Parma ed., 13.397b): solum ex fide Christi [Opera 20.437, b41]).
All these used ‘faith alone’ long before Luther was born.
In other words, you are absolutely WRONG when claiming that ‘sola fide’ is an invention of Luther.
What package are these quotes from?
Those citations mean nothing without the full quotations. It not just a question of the phrase “sola fide” but of the Lutheran means of without observance of the moral law. “Sola fide” would not be objectionable if it means what Paul is speaking of in Romans and Galatians, faith without works of the Mosaic Law.