Bede the Venerable
Catena Aurea · Lukasevangelium 2
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;) 24 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. And, behold, there was a man in Jerusalem, whose name was Simeon; and the same man was just and devout, waiting for the consolation of Israel; and the Holy Ghost was upon him.
(ubi sup.) Or the pigeon denotes simplicity, the turtle dove chastity, for the pigeon is a lover of simplicity, and the turtle dove of chastity, so that if by chance she has lost her mate, she heeds not to find another. Rightly then are the pigeon and turtle dove offered as victims to the Lord, because the simple and chaste conversation of the faithful is a sacrifice of righteousness well pleasing to Him.