'What does he mean when he says: “I have declared your justice?” He did not simply say: “I have given,” but “I have declared.” What does this mean? That he has justified our race not by right actions, not by toils, not by barter and exchange, but by grace alone (ἀλλʼ ἀπὸ χάριτος μόνης). Paul, too, made this clear when he said: “But now the justice of God has been made manifest independently of the Law.” But the justice of God comes through faith in Jesus Christ (δικαιοσύνη δὲ Θεοῦ διὰ πίστεως Ἰησοῦ Χριστοῦ) and not through any labor and suffering.'
John Chrysostom (349-407), from 'Adversus Judaeos', VII, §3, PG 48:919; translation in Fathers of the Church, Vol. 68, Discourses Against Judaizing Christians, Disc. 7.3.2 (Washington, D.C.: The Catholic University of America Press, 1979), pp. 186-187.
See 'Lutheran Catholicity' for more patristic quotes (click on post title to view).