The guilt involved is both personal, arising from any unintentional sins committed during the pains of labor—such as frustration with God or impatience—and also the innate guilt that the psalmist acknowledges: “In iniquity I was conceived, and in sin my mother bore me,” which pertains to both the mother and the child. After making these offerings, the priest declares the mother to be ceremonially clean. Alternatively, she may present two doves or two turtledoves instead. If the woman is impoverished and unable to provide a lamb along with a dove or turtledove, she is permitted to offer just two doves or turtledoves, designating one for a burnt offering and the other for a sin offering, in accordance with the scripture. The priest will then perform the sacred act of sacrifice through prayer and subsequently declare her clean. All these purification rites pertain to the mother and not to the infant. The subsequent scripture references from the book of Numbers convey God's directive to substitute the firstborn with the Levites.