3 The church sent them on their way, and as they traveled through Phoenicia and Samaria, they told how the Gentiles had been converted. This news made all the believers very glad.

Read Acts 15:3 Using Other Translations

And being brought on their way by the church, they passed through Phenice and Samaria, declaring the conversion of the Gentiles: and they caused great joy unto all the brethren.
So, being sent on their way by the church, they passed through both Phoenicia and Samaria, describing in detail the conversion of the Gentiles, and brought great joy to all the brothers.
The church sent the delegates to Jerusalem, and they stopped along the way in Phoenicia and Samaria to visit the believers. They told them—much to everyone’s joy—that the Gentiles, too, were being converted.