Isaiah 11:2
Douay-Rheims
And the spirit of the Lord shall rest upon him: the spirit of wisdom, and of understanding, the spirit of counsel, and of fortitude, the spirit of knowledge, and of godliness.
Gregory of Nazianzus
I think Isaiah loves to call the activities of the Spirit "spirits."
Source details
A.D. 389 · on Isa 11:2-3 (ON PENTECOST, ORATION 41:3)
Imported from an open dataset — not yet checked against the printed edition.