A.T. Robertson Commentary Acts 4:2

"being sore troubled because they taught the people, and proclaimed in Jesus the resurrection from the dead." — Acts 4:2 (ASV)

Being sore troubled (διαπονουμενο). Present passive participle of old verb διαπονεω (perfective use of δια) to be worked up, indignant. In the N.T. only here and 16:8.

Because (δια το). The articular infinitive with two accusatives, one the object (the people), the other ("they") of general reference.

In Jesus (εν Ιησου). In the case of Jesus, an actual instance of resurrection which the Sadducees denied (Matthew 22:23). This same use of εν appears in 1 Corinthians 4:6 (in us). The Sadducees were also aristocrats and political ecclesiastics who disliked popular disturbances. In particular, they resented the claim about Jesus whom they had helped crucify.