'Ashamed' in the Bible

Be not ashamed therefore of the testimony of our Lord, nor of me his prisoner: but suffer hardship with the gospel according to the power of God;

For which cause I suffer also these things: yet I am not ashamed; for I know him whom I have believed, and I am persuaded that he is able to guard that which I have committed unto him against that day.

The Lord grant mercy unto the house of Onesiphorus: for he oft refreshed me, and was not ashamed of my chain;

Give diligence to present thyself approved unto God, a workman that needeth not to be ashamed, handling aright the word of truth.