Verse 6. For a son or a daughter - For the birth of a son, or of a daughter: but the purification was for herself, as appears from the following verses. A sin-offering - Because of her ceremonial uncleanness, which required a ceremonial expiation.
8. The morality of this law obliges women who have received mercies from God in child-bearing, with all thankfulness to acknowledge his goodness to them, owning themselves unworthy of it, and (which is the best purification) to continue in faith, and love, and holiness, with sobriety.