Deuteronomy 6:4
Douay-Rheims
Hear, O Israel, the Lord our God is one Lord.
Gregory of Nyssa
Wherefore [Scripture] says, "The Lord God is one Lord." By the word Godhead it proclaims too the only-begotten God and does not divide the unity into a duality so as to call the Father and the Son two gods, although each is called God by holy writers.
Source details
A.D. 395 · on Deut 6:4 (ON NOT THREE GODS)
Imported from an open dataset — not yet checked against the printed edition.