“Being grieued that they taught the people, and preached through Iesus the resurrection from the dead.”
1611 King James Version (KJV)
4:2 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.
Ac 4:2 Being grieved. There were three classes of assailants: priests, military, and Sadducees. They had three grounds for action: (1) that Peter and John "taught the people", (2) that they taught "in the name of Christ" (Ac 4:18), and (3) that they bore witness of "the resurrection". And preached through Jesus the resurrection from the dead. The last doctrine, of the resurrection, uprooted the creed of the Sadducees (see notes on Mat 22:23 Ac 23:8). 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.