Leviticus 12
ECFLeviticus 12:3
Augustine of Hippo: It was certainly not for nothing that the commandment was given for the child “to be circumcised on the eighth day”; it can only have been because the rock, the stone with which we are circumcised, was Christ. It was “with knives of rock” or stone that the people were circumcised;“now the rock was Christ.” So why on the eighth day? Because in seven-day weeks the first is the same as the eighth; once you’ve completed the seven days, you are back at the first. The seventh is finished, the Lord is buried; we are back at the first, the Lord is raised up. The Lord’s resurrection, you see, promised us an eternal day and consecrated for us the Lord’s day. It’s called the Lord’s because it properly belongs to the Lord, because on it the Lord rose again. The rock has been restored to us; let those be circumcised who wish to say, “For we are the circumcision.” — SERMON 169.3
Leviticus 12:8
Bede: 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
Luke (2:21-24): And when eight days were accomplished for the circumcising of the child, his name was called JESUS, which was so named of the angel before he was conceived in the womb. 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; (As it is written in the law of the Lord, Every male that openeth the womb shall be called holy to the Lord;) And to offer a sacrifice according to that which is said in the law of the Lord, A pair of turtledoves, or two young pigeons. [Leviticus 12:8]