John Calvin on Acts 20:3-6

3. Because the Jews laid wait for him. The Lord did exercise his servant so diversely and continually that he set before us in him an example of most excellent constancy. It is not sufficient for him to be wearied with the labor and trouble of a long and wearisome journey, unless he be also brought in danger of his life by those which lay in wait for him. Let all the servants of Christ set this mirror before their eyes, that they may never faint through the wearisomeness of straits. Notwithstanding, when Paul doth journey another way that he may avoid their laying in wait, he showeth that we must have regard of our life so far forth that we throw not ourselves headlong into the midst of dangers. And those who accompany him give no small testimony of their godliness; and we see how precious his life was to the faithful, when as a great many being chosen out of diverse countries to be his companions, do for his sake take a hard and sharp journey not without great charges. Luke saith that Paul tarried at Philippos so long as the days of unleavened bread did last, because he had at that time better opportunity offered to teach. And forasmuch as it was unknown as yet that the law was disannulled, it stood him upon to beware, lest by neglecting the feast-day he should be thought among the rude to be a contemner of God. Though, for mine own part, I think that he sought principally opportunity to teach, because the Jews were then more attentive to learn.

Acts 20:7-13

7. And upon one day of the Sabbaths, when the disciples were come together to break bread, Paul disputed with them, being about to take his journey on the morrow; and he prolonged his speech until midnight. 8. And there were many lights in an upper chamber, where they were gathered together. 9. And a certain young man named Eutychus, sitting in a window, being fallen into a deep sleep, as Paul disputed long time, being more overcome with sleep, he fell down from the third loft downward, and was taken up dead. 10. And when Paul came down, he fell upon him, and embracing him, said, Be not ye troubled, for his soul is in him. 11. And when he was gone up, and had broken bread, and had, having had long conference until it was day, he departed. 12. And they brought the boy alive, and were not a little comforted. 13. But when he had taken ship, we loosed to Assos, thence to receive Paul, for so had he appointed, being about to go by land;