Verses with the word purification in the New Testament (2 verses):

Luke 2:22
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;

Acts 21:26
Then Paul took the men, and the next day purifying himself with them entered into the temple, to signify the accomplishment of the days of purification, until that an offering should be offered for every one of them.