Whereas Cornelius expoundeth the whole matter to the soldier and his servants, it tendeth to this end, that he may the more encourage them to give ear to the commandment, which they see is rather a commandment of God than of man; and he is not afraid to make known unto them so great a matter whom he had instructed well before.

And when - "It has been remarked that from Joppa, Jonah was sent to preach to the Gentiles at Nineveh, and that from the same place Peter was sent to preach to the Gentiles at Caesarea" (Clarke).

He sent them to Joppa - It has been properly remarked, that from Joppa, Jonah was sent to preach to the Gentiles of Nineveh; and from the same place Peter was sent to preach the Gospel to the Gentiles at Caesarea.

And when he had declared all these things unto them,.... Which he had heard and seen in the vision, and of which he gave them a particular account; partly to engage them the more cheerfully to go on the errand, and partly that they might be able to give a distinct relation of it to Peter, that so he might be moved the more to comply with the request, and come along with them:
he sent them to Joppa; perhaps not that evening, since it was at the ninth hour, or three o'clock in the afternoon, when Cornelius had the vision; and some time must be taken up in discourse with the angel, and afterwards in sending for his servants, and relating the affair to them, and giving them their proper instructions. So that it may be they did not set out till early the next morning, as seems from the following verse.

A devout soldier - How many such attendants have our modern officers? A devout soldier would now be looked upon as little better than a deserter from his colours.