Wisdom of Solomon 7:26

24 For wisdom is more mobile than any motion; because of her pureness she pervades and penetrates all things. 25 For she is a breath of the power of God, and a pure emanation of the glory of the Almighty; therefore nothing defiled gains entrance into her. 26 For she is a reflection of eternal light, a spotless mirror of the working of God, and an image of his goodness. 27 Although she is but one, she can do all things, and while remaining in herself, she renews all things; in every generation she passes into holy souls and makes them friends of God, and prophets; 28 for God loves nothing so much as the person who lives with wisdom.

Date: 100-50 B.C.E.
* Dates are based on scholarly estimates

Ambrose On the Christian Faith 1.7

The prophets say: In Your light we shall see light; and again: Wisdom is the brightness of everlasting light, and the spotless mirror of God's majesty, the image of His goodness. See what great names are declared! Brightness, because in the Son the Father's glory shines clearly: spotless mirror, because the Father is seen in the Son: image of goodness, because it is not one body seen reflected in another, but the whole power [of the Godhead] in the Son. The word image teaches us that there is no difference; expression, that He is the counterpart of the Father's form; and brightness declares His eternity. The image in truth is not that of a bodily countenance, not one made up of colors, nor modelled in wax, but simply derived from God, coming out from the Father, drawn from the fountainhead.

Date: 390-395 C.E.
* Dates are based on scholarly estimates