Being grieved - The word thus translated occurs in only one other place in the New Testament Acts 16:18. It implies more than simple sorrow; it was a mingled emotion of indignation and anger. They did not grieve because they thought it a public calamity, but because it interfered with their authority and opposed their doctrine. It means that it was painful to them, or they could not bear it. It is often the case that bigots, and people in authority, have this kind of grief, at the zeal of people in spreading the truth, and thus undermining their influence and authority.
That they taught the people - The ground of their grief was as much the fact that they should presume to instruct the people as the matter which they taught them. They were offended that unlearned Galileans, in no way connected with the priestly office, and unauthorized by them, should presume to set themselves up as religious teachers. They claimed the right to watch over the interests of the people, and to declare who was authorized to instruct the nation. It has been no unusual thing for men in ecclesiastical stations to take exceptions to the ministry of those who have not been commissioned by themselves. Such men easily fancy that all power to instruct others is lodged in their hands, and they oppose others simply from the fact that they have not derived their authority from them. The true question in this case was whether these Galileans gave proof that they were sent by God. The working of the miracle in this case should have been satisfactory. We have here, also, a striking instance of the fact that men may turn away from evidence, and from most important points, and fix their attention on something that opposes their prejudices, and which may be a matter of very little moment. No inquiry was made whether the miracle had been really performed; but the only inquiry was whether they had conformed to their views of doctrine and order.
And preached through Jesus - The Sadducees would be particularly opposed to this. They denied the doctrine of the resurrection, and they were troubled that the apostles adduced proof of it so strong as the resurrection of Jesus. It was perceived that this doctrine was becoming established among the people; multitudes believed that he had risen; and if he had been raised up, it followed also that others would rise. The Sadducees, therefore, felt that their cause was in danger, and they joined with the priests in endeavoring to arrest its spread among the people. This is the account of the first opposition that was made to the gospel as it was preached by the apostles. It is worthy of remark that it excited so much and so speedily the enmity of those in power, and that the apostles were so soon called to test the sincerity of their attachment to their Master. They who but a few days before had fled at the approach of danger, were now called to meet this opposition, and to show their attachment to a risen Redeemer; and they did it without shrinking. They showed now that they were indeed the true friends of the crucified Saviour, and this remarkable change in their conduct is one of the many proofs that they were influenced from above.

Being grieved - Διαπονουμενοι, They were thoroughly fatigued with the continuance of this preaching; their minds suffered more labor, through vexation at the success of the apostles, than the bodies of the apostles did in their fatiguing exercise of preaching during the whole day.

Being grieved that they taught the people,.... Any doctrine, and especially that which follows, and which particularly gave uneasiness to the Sadducees, they were exceedingly distressed by it; it pained them to the very heart, and they were filled with wrath and indignation:
and preached through, or in Jesus, the resurrection of the dead; they not only preached the doctrine of the resurrection of the dead in general, but gave an instance and proof of it in the resurrection of Christ, affirming that he was risen from the dead; and they also preached up the resurrection of the dead in his name, and asserted, that he would be the author of it, and it would be erected by his power: so that their doctrine was equally disagreeable to the Pharisees and Sadducees; to the Sadducees, who denied that there was, or would be any resurrection of the dead; and to the Pharisees, who though they believed it, yet were highly offended that it should be said, that Jesus was risen from the dead; and that the general resurrection of the dead should be attributed to him.

Being grieved. There were three classes of assailants: priests, military, and Sadducees. They had three grounds for action: that Peter and John taught the people, that they taught in the name of Christ, and that they bore witness of the resurrection. The last doctrine, of the resurrection, uprooted the creed of the Sadducees. While Jesus lived, his assailants were chiefly Pharisees; when his apostles began to preach his resurrection the Sadducees came to the front as his chief opposers. This will be noted throughout Acts.

The priests being grieved - That the name of Jesus was preached to the people; especially they were offended at the doctrine of his resurrection; for as they had put him to death, his rising again proved him to be the Just One, and so brought his blood upon their heads. The priests were grieved, lest their office and temple services should decline, and Christianity take root, through the preaching of the apostles, and their power of working miracles: the captain of the temple - Being concerned to prevent all sedition and disorder, the Sadducees - Being displeased at the overturning of all their doctrines, particularly with regard to the resurrection.