Acts 4:2

2 They were greatly disturbed because the apostles were teaching the people, proclaiming in Jesus the resurrection of the dead.

Read Acts 4:2 Using Other Translations

Being grieved that they taught the people, and preached through Jesus the resurrection from the dead.
greatly annoyed because they were teaching the people and proclaiming in Jesus the resurrection from the dead.
These leaders were very disturbed that Peter and John were teaching the people that through Jesus there is a resurrection of the dead.