'Purification' in the Bible

that setteth his heart to seek God, Jehovah, the God of his fathers, though he be not cleansed according to the purification of the sanctuary.

And they kept the charge of their God, and the charge of the purification, and'so did the singers and the porters, according to the commandment of David, and of Solomon his son.

and let the king appoint officers in all the provinces of his kingdom, that they may gather together all the fair young virgins unto Shushan the palace, to the house of the women, unto the custody of Hegai the king's chamberlain, keeper of the women; and let their things for purification be given them;

And the maiden pleased him, and she obtained kindness of him; and he speedily gave her her things for purification, with her portions, and the seven maidens who were meet to be given her out of the king's house: and he removed her and her maidens to the best place of the house of the women.