'Purification' in the Bible

And when the days of her purification according to the law of Moses were accomplished, they brought him to Jerusalem, to present him to the Lord;

Jesus ordered him to tell no one [that he might happen to meet], “But go and show yourself to the priest, and make an offering for your purification, just as Moses commanded, as a testimony (witness) to them [that this is a work of Messiah].”