Reference request: Trying to locate the reference of a quote by Pope Athanasius of Alexandria about the Trinity

I read this quote for Saint Athanasius of Alexandria in an Arabic book, but I am trying to locate the source (reference) of that quote (in which work for Athanasius), or something of the similar meaning by the saint. > "The Persons are not three gods, but rather they are one triune God > with the consistency of His mind (the Father), His word (the Son), and > His Spirit, who are the Father, the Son, and the Holy Spirit."