'Purifying' in the Bible

"When he has finished purifying the holy place, the Meeting Tent, and the altar, he is to present the live goat.

David sent some messengers to get her. She came to him and he had sexual relations with her. (Now at that time she was in the process of purifying herself from her menstrual uncleanness.) Then she returned to her home.

In the eighteenth year of his reign, he continued his policy of purifying the land and the temple. He sent Shaphan son of Azaliah, Maaseiah the city official, and Joah son of Joahaz the secretary to repair the temple of the Lord his God.

When you have finished purifying it, you will offer an unblemished young bull and an unblemished ram from the flock.