'Judaism' in the Bible

Phrygia and Pamphylia, Egypt and the districts of Libya around Cyrene, and the visitors from Rome, both Jews and proselytes (Gentile converts to Judaism),

This suggestion pleased the whole group. So they chose Stephen, a man full of faith and the Holy Spirit, Philip, Prochorus, Nicanor, Timon, Parmenas, and Nicolaus, a gentile convert to Judaism from Antioch.

When the meeting of the synagogue broke up, many Jews and devout converts to Judaism followed Paul and Barnabas, who kept talking to them and urging them to continue in the grace of God.