'Ashamed' in the Bible

Therefore do not be ashamed of the testimony of our Lord or of me His prisoner, but join with me in suffering for the gospel according to the power of God,

For this reason I also suffer these things, but I am not ashamed; for I know whom I have believed and I am convinced that He is able to guard what I have entrusted to Him until that day.

The Lord grant mercy to the house of Onesiphorus, for he often refreshed me and was not ashamed of my chains;

Be diligent to present yourself approved to God as a workman who does not need to be ashamed, accurately handling the word of truth.