'Purify' in the Bible

I will attack you; I will purify your metal with flux. I will remove all your slag.

Leave, leave, go out from there!Do not touch anything unclean;go out from her, purify yourselves,you who carry the vessels of the Lord.

They that sanctify themselves, and purify themselves in the gardens behind one tree in the midst, eating swine's flesh, and the abomination, and the mouse, shall be consumed together, saith the LORD.