The officials of the temple were worried sick that this Jesus stuff would catch on. They were right to worry. Let us not stop now "speaking the things which we have seen and heard."

Acts 4:18-20
So they called them and commanded them not to speak at all nor teach in the name of Jesus.

7-tips-for-talking-with-your-neighbors-about-christ. link

But Peter and John answered and said to them, “Whether it is right in the sight of God to listen to you more than to God, you judge.
For we cannot but speak the things which we have seen and heard.”

Bible Gateway link Acts 4: 18-20