Proof text: Creatio ex nihilo

We all know this is Augustine's breakthrough or at least he popularized this. I think though the Genesis of Creation account is not clear, but by progressive revelation, creatio ex nihilo is obvious and we can conclude that the Hebrew tradition recognize this: 2 Maccabees 7:28 and Rom. 4:17. And they are the first, to contribute this notion to the world, of God.