John Calvin on Acts 21:5-6

5. With their wives and children. This was no small testimony of love, in that they accompanied Paul out of the city with their wives and children, which thing Luke doth report, partly that he might commend their godliness according as it deserved; partly that he might declare that Paul had that honor given him which was due to him. Whence we do also gather, that he meant nothing less than to provide for his own commodity, seeing that he was not kept back with so great good will, which was a pleasant bait to entice him to stay. And we must also note the solemn custom of praying in weightier affairs, and that being certified by God of the danger, they are more stirred up to pray.

Acts 21:7-14

7. And when we had finished our course from Tyre, we came down to Ptolemais, and after that we had saluted the brethren, we abode with them one day. 8. And on the morrow, we which were with Paul departed, and came to Cesarea; and, entering into the house of Philip the evangelist, which was one of the seven, we abode with him. 9. And this man had four daughters, virgins, which did prophesy. 10. And when we abode many days, there came a certain prophet from Judea, named Agabus. 11. When he was come to us, he took, Paul’s girdle, and, binding his own feet and hands, he said, Thus saith the Holy Ghost, The man which owneth this girdle shall the Jews thus bind at Jerusalem, and shall deliver him into the hands of the Gentiles. 12. And when we had heard these things, both we, and also the rest which were of that place, requested him that he would not go up to Jerusalem. 13. Then Paul answered and said, What do you, weeping and afflicting my heart? I truly am ready not to be bound only, but also to die at Jerusalem, for the name of the Lord Jesus. 14. And when he would not be persuaded, we were quiet, saying, The will of the Lord be done.