Levítico 12

Levítico 12:8

The Lord commanded in the law that those who could were to offer a lamb for a son or a daughter, along with a turtledove or a pigeon. But one who did not have sufficient wealth to offer a lamb should offer two turtledoves or two young pigeons. Therefore the Lord, mindful in everything of our salvation, not only deigned for our sake to become a human being, though he was God, but also he deigned to become poor for us, though he was rich, so that by his poverty along with his humanity he might grant us to become sharers in his riches and his divinity. — HOMILY XV. ON THE PURIFICATION OF BLESSED MARY