Don’t need to. The Trinity wasn’t defended by the early fathers by a single prooftext. It was defended on the basis of every scriptural text that 1) demonstrates there is only one God; 2) demonstrates the distinction between the Father, the Son, and the Holy Ghost; 3) demonstrates the divinity and/or eternal nature of Christ; 4) demonstrates the humanity of Christ; 5) and demonstrates the personhood of the Holy Spirit. I am sure we could put together a Bible Study on these points if you would like to brush you up on your Apologetics.
As you can imagine, there are a host of scripture passages that attest to these points.