The Creed of Nicea
We believe in one God, the Father, Almighty, Maker of all things visible and invisible;
And in one Lord Jesus Christ, the Son of God, begotten of the Father, only-begotten, that is, from the substance (ousia) of the Father; God from God, light from light very God from very God, begotten not made, of one substance (homoousios, consubstantial) with the Father, through whom all things were made both in heaven and on earth; who for us men and for our salvation came down and was incarnate, made man, suffered, and rose again on the third day, ascended into heaven, and is coming to judge the living and the dead;
And in the Holy Spirit.
And to those who say, ‘there ‘was a time when he was not’, and: ‘before he was begotten he was not’, and : ‘he came into being from nothing’, or those who pretend that the Son of God is ‘of another substance (hypostasis) or essence (ousia), or “created” or “alterable, or “mutable”, the Catholic and Apostolic church places under a curse.
Council of Nicea, 325 AD