The reading is from Acts of the Apostles 14:20-28; 15:1-4

IN THOSE DAYS, Paul went on with Barnabas to Derbe. When they had preached the gospel to that city and had made many disciples, they returned to Lystra and to lconion 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. And when they had appointed elders for them in every church, with prayer and fasting they committed them to the Lord in whom they believed. Then they passed through Pisidia, and came to Pamphylia. And when they had spoken the word in Perga, they went down to Attalia; and from there they sailed to Antioch, where they had been commended to the grace of God for the work which they had fulfilled. And when they arrived, they gathered the church together and declared all that God had done with them, and how he had opened a door of faith to the Gentiles. And they remained no little time with the disciples. But some men came down from Judea and were teaching the brethren, "Unless you are circumcised according to the custom of Moses, you cannot be saved." And when Paul and Barnabas had no small dissension and debate with them, Paul and Barnabas and some of the others were appointed to go up to Jerusalem to the apostles and the elders about this question. So, being sent on their way by the church, they passed through both Phoenicia and Samaria, reporting the conversion of the Gentiles, and they gave great joy to all the brethren. And when they came to Jerusalem, they were welcomed by the church and the apostles and the elders, and they declared all that God had done with them.