'Purification' in the Bible

And when the days of their purification were completed according to the law of Moses, they brought him up to Jerusalem to present [him] to the Lord

So a dispute occurred on the part of John's disciples with a Jew concerning purification.

Then Paul took along the men on the next day, [and] [after he] had purified himself together with them, he entered into the temple [courts], announcing the completion of the days of purification until {the time} the offering would be presented on behalf of each one of them.

who is the radiance of his glory and the representation of his essence, sustaining all [things] by the word of power. [When he] had made purification for sins through him, he sat down at the right hand of the Majesty on high,