3 occurrences across the corpus

KJV Apocrypha (Catholic Deuterocanon)

2 Maccabees 2:21

And the manifest signs that came from heaven unto those that behaved themselves manfully to their honour for Judaism: so that, being but a few, they overcame the whole country, and chased barbarous multitudes,

2 Maccabees 14:38

For in the former times, when they mingled not themselves with the Gentiles, he had been accused of Judaism, and did boldly jeopard his body and life with all vehemency for the religion of the Jews.

Apostolic Fathers

Ignatius to the Philadelphians 2:6

But if any one shall preach the Jewish law unto you, hearken not unto him; for it is better to receive the doctrine of Christ from one that has been circumcised, than Judaism from one that has not.