'Unstained' in the Bible

Jonathan’s bow never retreated,Saul’s sword never returned unstained,from the blood of the slain,from the bodies of the mighty.

So then I would have the men everywhere pray, lifting to God holy hands which are unstained with anger or strife;

It was fitting for us to have such a High Priest [perfectly adapted to our needs], holy, blameless, unstained [by sin], separated from sinners and exalted higher than the heavens;

Pure and undefiled religion before our God and Father is this: to look after orphans and widows in their distress and to keep oneself unstained by the world.