'Affirm' in the Bible

Why not (as we are slanderously reported, and as some affirm that we say), "Let us do evil, that good may come?" Those who say so are justly condemned.

I affirm, by the boasting in you which I have in Christ Jesus our Lord, I die daily.

desiring to be teachers of the law, though they understand neither what they say, nor about what they strongly affirm.

This saying is faithful, and concerning these things I desire that you affirm confidently, so that those who have believed God may be careful to maintain good works. These things are good and profitable to men;