Epistle to Diognetus

In the next place, I fancy that thou art chiefly anxious to hear about their not practicing their religion in the same way as the Jews.

Ἑξῆς δὲ περὶ τοῦ μὴ κατὰ τὰ αὐτὰ Ἰουδαίοις θεοσεβεῖν αὐτοὺς οἶμαί σε μάλιστα ποθεῖν ἀκοῦσαι.

The Jews then, so far as they abstain from the mode of worship described above, do well in claiming to reverence one God of the universe and to regard Him as Master; but so far as they offer Him this worship in methods similar to those already mentioned, they are altogether at fault.