Acts 4:13
Now when these men saw how boldly Peter and John spoke, and perceived that they were uneducated and [even] ignorant men, they were quite surprised; then they recognized that they had been with Jesus.
Acts 14:3
Paul and Barnabas remained there a long time and spoke [the message] boldly for [or, in the power of] the Lord who gave His approval to the message of unearned favor by allowing [miraculous] signs and wonders to be performed by them.
1 Thessalonians 2:2
But [even though] we had already suffered and been mistreated at Philippi [See Acts 16:19-24], as you people know, we had the boldness, [with help] from God, to tell you His message in spite of much struggle [i.e., opposition].