'Irreproachable' in the Bible

And He will also confirm you to the end [keeping you strong and free of any accusation, so that you will be] blameless and beyond reproach in the day [of the return] of our Lord Jesus Christ.

yet Christ has now reconciled you [to God] in His physical body through death, in order to present you before the Father holy and blameless and beyond reproach—

to keep all His precepts without stain or reproach until the appearing of our Lord Jesus Christ,

namely, a man of unquestionable integrity, the husband of one wife, having children who believe, not accused of being immoral or rebellious.