'Judaism' in the Bible

The proposal pleased the entire group, so they chose Stephen, a man full of faith and of the Holy Spirit, with Philip, Prochorus, Nicanor, Timon, Parmenas, and Nicolas, a Gentile convert to Judaism from Antioch.

For you have heard of my former way of life in Judaism, how I was savagely persecuting the church of God and trying to destroy it.

I was advancing in Judaism beyond many of my contemporaries in my nation, and was extremely zealous for the traditions of my ancestors.