10. was saved: did save (6) has roughly the sense 'recovered from death,' but that idea is ironic: the Old Law (6) "can discover sin, but not remove [it]" (Paradise Lost 12.290). Just as Moses cannot lead the Chosen People into Canaan (PL 12.307-309), so the unnamed mother of lines 5-6 cannot be "saved" by ritual purification. In fact, as the concordance of Leviticus 12* and Luke 2:22-24** shows, the woman "purified" by ritual law is a type: the generic woman in Leviticus foreshadows Mary, the Mother of God.

*Lev 12:2,4,6-7,8: If a woman have conceived seed, and born a ... child, then she shall be unclean. ... [and] shall continue in the blood of her purifying ...; she shall touch no hallowed thing, nor come into the sanctuary, until the days of her purifying be fulfilled. ... when the days of her purifying are fulfilled, ... she shall bring a lamb of the first year for a burnt offering, and a young pigeon, or a turtledove, for a sin offering, ... unto the priest, Who shall offer it before the LORD, and make an atonement for her; and she shall be cleansed from the issue of her blood. ... And if she be not able to bring a lamb, then she shall bring two turtles, or two young pigeons.
**Lk 2:22,24 - when the days of [Mary’s] purification according to the law of Moses were accomplished,[she and Joseph] brought [Jesus] to Jerusalem, to present him to the LORD ... And to offer a sacrifice according to that which is said in the law of the LORD, A pair of turtledoves, or two young pigeons.