And if the burnt sacrifice for his offering to the LORD be of fowls, then he shall bring his offering of turtledoves, or of young pigeons.
All Commentaries on Leviticus 1:14 Go To Leviticus 1
Bede
AD 735
In very many ceremonies of the law one who needed to be cleansed was ordered to be cleansed by [offering] these [birds]. A pigeon indicates simplicity and a turtledove indicates chastity, for a pigeon is a lover of simplicity and a turtledove is a lover of chastity—so that if by chance one loses its mate it will not subsequently seek another.