Clement of Rome.

Bishop of Rome, end of first century. — EDITION:}. B. Lightfoot in The Apostolic Fathers (ed. J. R. Harmer, 1891).

II. Sanctification — Justification

(a) By Works

Since we are the portion of the Holy one let us practise what belongs to holiness. . . . Let us put on concord, being humble in mind, disciplined, keeping ourselves from gossip and slander, being justified by works, not words. . .

Ibid, xxx

(b) By Faith

They all [sc. the patriarchs] were honoured and glorified, not through themselves or their works or their righteous behaviour, but through God's will. And we also, who have been called in Christ Jesus through his will, are not justified through ourselves or through our own wisdom or understanding or piety, or our actions done in holiness of heart, but through faith, for it is through faith that Almighty God has justified all men that have been from the beginning of time: to whom be glory for ever and ever. Amen.

Ibid, xxxii