'Purification' in the Bible

And when the time for their purification came [that is, the mother’s purification and the baby’s dedication] according to the Law of Moses, they brought Him up to Jerusalem to present Him to the Lord [set apart as the Firstborn]

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].”