A woman that had lain in, when the time set for her return to the sanctuary had come, was not to attend there empty, but must bring her offerings, Lev 12:6. 1. A burnt-offering; a lamb if she was able, if poor, a pigeon. This she was to offer in thankfulness to God for his mercy to her, in bringing her safely through the pains of child-bearing and all the perils of child-bed, and in desire and hopes of God's further favour both to her and to the child. When a child is born there is joy and there is hope, and therefore it was proper to bring this offering, which was of a general nature; for what we rejoice in we must give thanks for, and what we are in hopes of we must pray for. But, besides this, 2. She must offer a sin-offering, which must be the same for poor and rich, a turtle-dove or a young pigeon; for, whatever difference there may be between rich and poor in the sacrifices of acknowledgment, that of atonement is the same for both. This sin-offering was intended either, (1.) To complete her purification from that ceremonial uncleanness which, though it was not in itself sinful, yet was typical of moral pollution; or, (2.) To make atonement for that which was really sin, either an inordinate desire of the blessing of children or discontent or impatience under the pains of child-bearing. It is only by Christ, the great sin-offering, that the corruption of our nature is done away, and to that it is owing that we are not for ever excluded by it from the sanctuary, and from eating of the holy things. According to this law, we find that the mother of our blessed Lord, though he was not conceived in sin as others, yet accomplished the days of purification, and then presented her son to the Lord, being a first-born, and brought her own offering, a pair of turtle-doves, Luk 2:22-24. So poor were Christ's parents that they were not able to bring a lamb for a burnt-offering; and so early was Christ made under the law, to redeem those that were under it. The morality of this law obliges those women that have received mercy from God in child-bearing with all thankfulness to own God's goodness to them, acknowledging themselves unworthy of it, and (which is the best purification of women that have been saved in child-bearing, Ti1 2:15) to continue in faith, and charity, and holiness, with sobriety; for this shall please the Lord better than the turtle-doves or the young pigeons.

When the days of her purifying - It is not easy to account for the difference in the times of purification, after the birth of a male and female child. After the birth of a boy the mother was considered unclean for forty days; after the birth of a girl, four-score days. There is probably no physical reason for this difference, and it is difficult to assign a political one. Some of the ancient physicians assert that a woman is in the order of nature much longer in completely recovering after the birth of a female than after the birth of a male child. This assertion is not justified either by observation or matter of fact. Others think that the difference in the time of purification after the birth of a male and female is intended to mark the inferiority of the female sex. This is a miserable reason, and pitifully supported.
She shall bring - a burnt-offering, and - a sin-offering - It is likely that all these ordinances were intended to show man's natural impurity and original defilement by sin, and the necessity of an atonement to cleanse the soul from unrighteousness.

And if she be not able to bring a lamb,.... As everyone was not in circumstances sufficient to be at the expense of buying a lamb for this purpose, having none of their own:

then she shall bring two turtles, or two young pigeons; which was a kind and merciful provision for the poorer sort; since it was necessary that by them the favour received should be acknowledged, as well as the sin attending them in such circumstances should be atoned for. This being the offering brought by the mother of our Lord, shows the state of poverty in which she was; and by this, and the circumcision of her child, and the presentation of it before the Lord at the time of her purification, it appears that they were both under the law, and obedient to it:

the one for a burnt offering, and the other for a sin offering; Jarchi observes, that in oblations the sin offering goes before the burnt offering, for sin being atoned for, the gift was accepted; but here the burnt offering went first, the reason is not very apparent:

and the priest shall make an atonement for her, and she shall be clean; equally the same as if she had brought a lamb, instead of young pigeons, or turtledoves.

Next: Leviticus Chapter 13

the days of her purifying--Though the occasion was of a festive character, yet the sacrifices appointed were not a peace offering, but a burnt offering and sin offering, in order to impress the mind of the parent with recollections of the origin of sin, and that the child inherited a fallen and sinful nature. The offerings were to be presented the day after the period of her separation had ended--that is, forty-first for a boy, eighty-first for a girl.