Derbe
“A small Lycaonian town on the extreme boundary of the Roman province of Galatia”
Derbe was 30 miles southeast of Lystra and the most easterly city visited by Paul and Barnabas. Here the apostles preached the gospel and “made many disciples.” One of their converts was name Gaius, the same who accompanied Paul on his last journey to Asia (Acts 20:4). After concluding their labors in Derbe, Paul and Barnabas returned to Lystra and to Iconium and to Antioch, strengthening the souls of the disciples, exhorting them to continue in the faith, and saying that through many tribulations we must enter the kingdom of God. (Acts. 14:21-22)
Returning to Lystra showed remarkable perseverance and faith, as well as dedication to the setting apart Paul and Barnabas had received in Antioch (Acts 13:2).
Acts 14:20-21
20:
Howbeit, as the disciples stood round about him, he rose up, and came into the city: and the next day he departed with Barnabas to Derbe.
21:
And when they had preached the gospel to that city, and had taught many, they returned again to Lystra, and to Iconium, and Antioch,