Works of Gregory Thaumaturgus, Dionysius of Alexandria, and Archelaus

the living; Holy Fount; Sanctity, the Supplier original: "χορηγός" of Sanctification; in whom is manifested God the Father, who is above all and in all, and God the Son, who is through all. There is a perfect Trinity, in glory and eternity and sovereignty, neither divided nor estranged original: "ἀπαλλοτριουμένη". Wherefore there is nothing either created or in servitude original: "δοῦλον" in the Trinity; nor anything superinduced original: "ἐπείσακτον", as if at some former period it was non-existent, and at some later period it was introduced. And thus neither was the Son ever wanting to the Father, nor the Spirit to the Son; but without variation and without change, the same Trinity abides ever.

See also Gregory Nazianz., Orat. 37, p. 609.
Gregory Nazianz., Orat. 40, p. 668, with reference apparently to our author, says: "In the Trinity there is nothing either in servitude or created, or superinduced, as I heard one of the learned say."
In one codex we find the following addition here: "Neither does the unity grow into duality, nor the duality into trinity; or = Neither does the condition of the one grow into the condition of the two, nor that of the two into the condition of the three."