'Purifying' in the Bible

Then Moses slaughtered it, took the blood, and applied it with his finger to the horns of the altar on all sides, purifying the altar. He poured out the blood at the base of the altar and consecrated it so that atonement can be made on it.

“When he has finished purifying the most holy place, the tent of meeting, and the altar, he is to present the live male goat.

David sent messengers to get her, and when she came to him, he slept with her. Now she had just been purifying herself from her uncleanness. Afterward, she returned home.