Not to speak at all, &c.— That is, privately; nor to teach, that is, publicly. This is the very thing which men, conscious of the truth of the apostles testimony, and self-condemned, would do,—stop their mouths by violence, as they knew they could not answer them any other way.
Related Commentaries of Acts 4:18
Acts 4:18
18 And they called them, and commanded them not to speak at all nor teach in the name of Jesus.