There is an interesting article that appeared in the Journal of Ecclesiastical History, Vol. 57, No. 4, October 2006 published by Cambridge University Press. It is "Justification by Faith: A Patristic Doctrine," by D. H. Williams. One does not have to agree with everything in his article in order to appreciate it. But in this article he deals somewhat at length with Hilary of Poitiers' (AD. 315-67) Commentary on the Gospel of Matthew. On page 658 of this issue of the journal, Williams includes the following translation of Hilary of Poitiers' Commentary on Matthew in a footnote. I'm giving a fuller reference to the source than Williams does to be more helpful to a reader...
Williams is careful to point out that Hilary's treatment of the doctrine of justification by faith is not a full blown defense of sola fide with respect to the doctrine of salvation as a whole. But he does point out on pp. 651-652 of his article that in "[t]he otherwise impressive historical survey of justification by faith by Alister McGrath dismisses anything that pre-Augustinian writers had to say on the subject, on the grounds that patristic Christianity suffered from an acute case of dependency on Greek philosophy rather than on the Bible. Such a criticism is part of the longstanding legacy of unease about the patristic era on the part of Protestant scholars. Basing his opinion on the outmoded view that post-apostolic Christianity was corrupted by the vagaries of Hellenism, McGrath concludes that in terms of a theological understanding of justification, ‘early theologians of the western church… approached their text [the Latin Bible] and their subject with a set of presuppositions which owed more to the Latin language and culture than to Christianity itself ’. See Alister McGrath, Iustitia Dei : A History of the Christian Doctrine of Justification (Cambridge 1986), i. 15.Hilary of Poitiers commenting on Matthew 9:3: "It disturbed the scribes that sin was forgiven by a man (for they considered that Jesus Christ was only a man) and that sin was forgiven by Him whereas the Law was not able to absolve it, since faith alone justifies."
Latin text: Movet scribas remissum ab homine peccatum: hominem enim tantum in Iesu Christo contuebantur et remissum est ab eo quod lex laxare non poterat; fides enim sola iustificat. Sancti Hilarii In Evangelium Matthaei Commentarius, Caput VIII, §6, PL 9:961A.