'Purifying' in the Bible

For their place was by the side of the sons of Aaron for the service of the house of Jehovah, over the courts, and over the chambers, and over the purifying of all holy things, and for the work of the service of the house of God;

And when every maiden's turn came to go in to king Ahasuerus after that she had been treated for twelve months, according to the manner of the women (for so were the days of their purification accomplished six months with oil of myrrh, and six months with spices, and with things for the purifying of the women,

And when the days were fulfilled for their purifying according to the law of Moses, they brought him to Jerusalem to present him to the Lord

in order that he might sanctify it, purifying it by the washing of water by the word,