“Now when the congregation was broken up, many of the Jews and religious proselytes followed Paul and Barnabas: who, speaking to them, persuaded them to continue in the grace of God.”
King James Version (KJV)
13:43 Who speaking to them - More familiarly, persuaded them to continue - For trials were at hand, in the grace of God - That is, to adhere to the Gospel or Christian faith.
Ac 13:43 When the congregation was broken up. When the services were over, many, both Jews and proselytes, followed them to learn more, and possibly yielded to Christ. Persuaded them to continue in the grace of God. By trusting in and obeying him. This could not be done if they refused Christ when he was preached to them.