'Convert' in the Bible

And the foreigners who join themselves to the Lordminister to Him, love the name of Yahwehand become His servants,all who keep the Sabbath without desecrating itand who hold firmly to My covenant—

Greet also the church that meets in their home.Greet my dear friend Epaenetus, who is the first convert to Christ from Asia.

He must not be a new convert, or he might become conceited and fall into the condemnation of the Devil.