Christian Doctrine of God and His Law
Now we also confess that God exists, but that He is one, the creator, and maker, and fashioner of this universe; and we know that all things are arranged by His providence, but by Him alone. And we have learned a holy law; but we have as lawgiver Him who is really God, who teaches us to act righteously, and to be pious, and to do good. And concerning piety He says, “You shall have no other gods before me. You shall not make unto you any graven image, or any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth: you shall not bow down yourself to them, nor serve them: for I am the Lord your God.” And of doing good He said: “Honour your father and your mother; that it may be well with you, and that your days may be long in the land which I the Lord God give you.”
Again, concerning righteousness: “You shall not commit adultery. You shall not kill. You shall not steal. You shall not bear false witness against your neighbour. You shall not covet your neighbour's wife, you shall not covet your neighbour's house, nor his land, nor his man-servant, nor his maid-servant, nor his ox, nor his beast of burden, nor any of his cattle, nor anything that is your neighbour's. You shall not wrest the judgment of the poor in his cause. From every unjust matter keep you far.
The innocent and righteous you shall not slay; you shall not justify the wicked; and you shall not take a gift, for gifts blind the eyes of them that see and pervert righteous words.” Of this divine law, then, Moses, who also was God's servant, was made the minister both to all the world, and chiefly to the Hebrews, who were also called Jews, whom an Egyptian king had in ancient days enslaved, and who were the righteous seed of godly and holy men— Abraham, and Isaac, and Jacob.
God, being mindful of them, and doing marvellous and strange miracles by the hand of Moses, delivered them, and led them out of Egypt, leading them through what is called the desert; whom He also settled again in the land of Canaan, which afterwards was called judæa, and gave them a law, and taught them these things. Of this great and wonderful law, which tends to all righteousness, the ten heads are such as we have already rehearsed.
Source: Theophilus to Autolycus (New Advent)