So also Wisdom, since He proceeds from
God, is generated from the very substance of God. Under the figure of a bodily
effluence, nevertheless, He is also called a kind of pure and clean effluence
of the glory of the Almighty. Both of these similes show with great clarity
that there is a community of substance between the Son and the father. For an
effluence seems to be ομουσιος, that is, of one substance with that
body from which it is either an effluence or an exhalation. (Origen, Commentaries
on Hebrews, c. A.D. 254, in The Faith of the Early Fathers, 3 vols. [trans.
William A. Jurgens; Collegeville, Minn.: The Liturgical Press, 1970], 1:215)
The following is a scan of PG 14:1308: