'Imprisonment' in the Bible

For it is right for me to think this about all of you, because I have you in my heart, since both in my imprisonment and in the defense and confirmation of the gospel all of you became partners in God's grace together with me.

and most of the brothers and sisters, having confidence in the Lord because of my imprisonment, now more than ever dare to speak the word fearlessly.

The former proclaim Christ from selfish ambition, not sincerely, because they think they can cause trouble for me in my imprisonment.