'Purification' in the Bible

Now there were standing there six stone water-vessels, according to the purification of the Jews, holding two or three measures each.

There was therefore a reasoning of the disciples of John with a Jew about purification.

Then Paul, taking the men, on the next day, having been purified, entered with them into the temple, signifying the time the days of the purification would be fulfilled, until the offering was offered for every one of them.

who being the effulgence of his glory and the expression of his substance, and upholding all things by the word of his power, having made by himself the purification of sins, set himself down on the right hand of the greatness on high,