1 Corinthians 8:6

Epistle of Ignatius to the Tarsians

For says the apostle, "There is one God, the Father, of whom are all things; and one Lord Jesus Christ, by whom are all things."[15]

Epistle of Ignatius to the Philippians

as Paul admonished you. For if there is one God of the universe, the Father of Christ, "of whom are all things; "[5]

Epistle of Ignatius to the Philippians

and one Lord Jesus Christ, our [Lord], "by whom are all things; "[6]

Epistle of Ignatius to the Philippians

And again, "One Lord Jesus Christ."[13]

Clement of Alexandria The Instructor Book II

But," he says, "through thy knowledge thy weak brother perishes, for whom Christ died; and they that wound the conscience of the weak brethren sin against Christ."[30]

Tertullian Against Marcion Book V

Marcion, however, does not say that the Creator is not God; so that the apostle can hardly be thought to have ranked the Creator amongst those who are called gods, without being so; since, even if they had been gods, "to us there is but one God, the Father."[317]

Hippolytus Dogmatical and Historical Fragments

For in this he has said only what Christ testifies of Himself. For Christ gave this testimony, and said, "All things are delivered unto me of my Father; "[219]

Pseudo-Gregory Thaumaturgus A Sectional Confession of Faith

establishes the oneness of the nature; and thus there is a (divinity that is the) property of the Father, according to the word, "There is one God the Father; "[29]

Pseudo-Gregory Thaumaturgus A Sectional Confession of Faith

For Paul addresses the Father as one in respect of divinity, and speaks of the Son as one in respect of lordship: "There is one God the Father, of whom are all things, and we for Him; and one Lord Jesus Christ, by whom are all things, and we by Him."[36]