Moses
Leviticus 12:6ESV·traditional attribution

“And when the days of her purifying are completed, whether for a son or for a daughter, she shall bring to the priest at the entrance of the tent of meeting a lamb a year old for a burnt offering, and a pigeon or a turtledove for a sin offering,

Matthew Henry Presbyterian @wholebiblehenry

A woman that had lain in, when the time set for her return to the sanctuary had come, was not to attend there empty, but must bring her offerings, Lev 12:6. 1. A burnt-offering; a lamb if she was able, if poor, a pigeon.

Commenting on Leviticus 12:6-8

John Gill Reformed Baptist @doctorgill

Who shall offer it before the Lord,.... Upon the altar of burnt offering: and make an atonement for her; for whatsoever sin in connection with or that attended childbearing; as typical of the atonement by Christ both for sin original and actual: and she shall be cleansed from the issue of her blood; in a ceremonial sense, and according to that law be pure and...

Jamieson-Fausset-Brown Reformed @jfbcommentary

the days of her purifying--Though the occasion was of a festive character, yet the sacrifices appointed were not a peace offering, but a burnt offering and sin offering, in order to impress the mind of the parent with recollections of the origin of sin, and that the child inherited a fallen and sinful nature.