'Clean' in the Bible

And David went out to them, and said to them, If you have come in peace to give me help, my heart will be united with yours; but if you have come to give me up to those who would take my life, though my hands are clean from wrongdoing, then may the God of our fathers see it and give you punishment.

Their place was by the side of the sons of Aaron in all the work of the house of the Lord, in the open spaces and in the rooms, in the making clean of all the holy things, in doing all the work of the house of the Lord,