When Saul arrived in Jerusalem, he tried to meet with the believers, but they were all afraid of him. They did not believe he had truly become a believer!
I preached first to those in Damascus, then in Jerusalem and throughout all Judea, and also to the Gentiles, that all must repent of their sins and turn to God—and prove they have changed by the good things they do.
Even that question came up only because of some so-called believers there—false ones, really—who were secretly brought in. They sneaked in to spy on us and take away the freedom we have in Christ Jesus. They wanted to enslave us and force us to follow their Jewish regulations.