'Blameless' in the Bible

You are witnesses, and so is God, as to how holy and righteous and blameless our conduct was toward you who believe.

so that your hearts are strengthened in holiness to be blameless before our God and Father at the coming of our Lord Jesus with all his saints.

Now may the God of peace himself make you completely holy and may your spirit and soul and body be kept entirely blameless at the coming of our Lord Jesus Christ.