John Calvin Commentary Acts 15:33

"And after they had spent some time [there], they were dismissed in peace from the brethren unto those that had sent them forth." — Acts 15:33 (ASV)

They were let go in peace. That is, when they departed, the brethren, in taking their leave of them, wished them well, as friends usually do. And there is synecdoche in this part, because only one of the two returned to Jerusalem.

A correction is added immediately in the text, stating that it seemed good to Silas to remain there; but when Luke joins them both together, his meaning is only to declare that the Church was at peace before they considered any return.

Finally, he adds that Paul and Barnabas, as long as they were at Antioch, devoted themselves to teaching and continued in this work, and yet they also made room for many others. From this it appears that they all had the same desire without resentment, so that they worked together to do good.

It seems, however, that he mentions many others deliberately, so that we would not think that after Paul and Barnabas had departed, that Church was destitute, when in fact it flourished with an abundance of teachers. Moreover, the blessing of God, which immediately began to appear again in that Church, is now once again commended and extolled—the very Church that Satan, through his ministers, attempted to scatter and lay waste miserably.