'Speak Boldly' in the Bible

The same also began to speak boldly in the synagogue. But Priscilla and Aquila, having heard him, took him to themselves, and expounded to him the way of God more accurately.

For the king knows well concerning these things, to whom also I speak boldly; for I am persuaded that no one of these things is hidden from him; for this has not been done in a corner.

for which I am an ambassador in chains, that therein I may speak boldly, as I ought to speak.