Ellicott's Commentary for English Readers - Luke 2:24
(24) A pair of turtle doves.—The law of Leviticus 12:8 allowed these to be substituted for the normal sacrifice of a lamb as a burnt-offering, and a pigeon or dove as a sin-offering, when the mother was “not able” to offer the former. We may see, therefore, in this fact, another indication of the poverty of Joseph and his espoused wife. The offering had, like all other sacrifices, to be made in the Temple. It seems all but certain that this visit to Jerusalem must have preceded the visit of the... read more
Ellicott's Commentary for English Readers - Luke 2:22
(22) When the days of her purification . . .—The primary idea of the law of Leviticus 12:1-6, would seem to have been that of witnessing to the taint of imperfection and sin attaching to every child of man, just as that of circumcision (its merely physical aspects being put aside) was that of the repression or control of one chief element of that sinfulness. Here neither was necessary; but the whole mystery of the birth was not as yet revealed to Mary, and therefore her act was simply one of... read more