After the expiration of the days of her purification "with regard to a son or a daughter," i.e., according as she had given birth to a son or a daughter (not for the son or daughter, for the woman needed purification for herself, and not for the child to which she had given birth, and it was the woman, not the child, that was unclean), she was to bring to the priest a yearling lamb for a burnt-offering, and a young pigeon or turtle-dove for a sin-offering, that he might make atonement for her before Jehovah and she might become clean from the course of her issue. שׁנתו בּן, lit., son of his year, which is a year old (cf. Leviticus 23:12; Numbers 6:12, Numbers 6:14; Numbers 7:15, Numbers 7:21, etc.), is used interchangeably with שׁנה בּן (Exodus 12:5), and with שׁנה בּני in the plural (Leviticus 23:18-19; Exodus 29:38; Numbers 7:17, Numbers 7:23, Numbers 7:29). דּמים דּמור, fountain of bleeding (see at Genesis 4:10), equivalent to hemorrhage (cf. Leviticus 20:18). The purification by bathing and washing is not specially mentioned, as being a matter of course; nor is anything stated with reference to the communication of her uncleanness to persons who touched either her or her couch, since the instructions with regard to the period of menstruation no doubt applied to the first seven and fourteen days respectively. For her restoration to the Lord and His sanctuary, she was to come and be cleansed with a sin-offering and a burnt-offering, on account of the uncleanness in which the sin of nature had manifested itself; because she had been obliged to absent herself in consequence for a whole week from the sanctuary and fellowship of the Lord. But as this purification had reference, not to any special moral guilt, but only to sin which had been indirectly manifested in her bodily condition, a pigeon was sufficient for the sin-offering, that is to say, the smallest of the bleeding sacrifices; whereas a yearling lamb was required for a burnt-offering, to express the importance and strength of her surrender of herself to the Lord after so long a separation from Him. But in cases of great poverty a pigeon might be substituted for the lamb (Leviticus 12:8, cf. Leviticus 5:7, Leviticus 5:11).

Leviticus 13:5 Parallel Commentaries

Leviticus 13:4 "But if the bright spot is white on the skin of his body, and it does not appear to be deeper than the skin, and the hair on it has not turned white, then the priest shall isolate him who has the infection for seven days.

Leviticus 13:6 "The priest shall look at him again on the seventh day, and if the infection has faded and the mark has not spread on the skin, then the priest shall pronounce him clean; it is only a scab. And he shall wash his clothes and be clean.