“(As it is written in the law of the Lord, Every male that openeth the womb shall be called holy to the Lord;)”
Luke 2:23 — Greek Interlinear
Church Fathers on Luke 2:23
Next after the circumcision they wait for the time of purification, as it is said, And when the days of her purification according to the law of Moses were come.
If you diligently examine the words of the law, you will find indeed that the mother of God as she is free from all connection with man, so is she exempt from any obligation of the law. For not every woman who brings forth, but she who has received seed and brought forth, is pronounced unclean, and by the ordinances of the law is taught that she must be cleansed, in order to distinguish probably from her who though a virgin has conceived and brought forth. But that we might…
Therefore the Evangelist has well observed, that the days of her purification were come according to the law, who since she had conceived of the Holy Spirit, was free from all uncleanness. It follows, They brought him to Jerusalem to present him to the Lord.