Leviticus 15:13-15

13-15. When he… is cleansed When by any means his issue was healed and his physical purity was restored he was to pass through a ceremonial cleansing after seven days by washing his clothes and bathing his flesh in running, that is, living, water, and by presenting to the priest two turtle doves, or two young pigeons, one for a sin offering and the other for a burnt offering. For the order see Introduction, (5.) The sin offering was required because all natural evil springs more or less directly from moral evil or sin.

An atonement… for his issue The physical defilement needed to be covered from the eye of Infinite Purity, and its moral cause needed expiation, in addition to the satisfaction which should be rendered for duties omitted during the period of uncleanness. Jesus Christ “bare our sicknesses.” Matthew 8:17, note. If we “are complete in him,” (Colossians 2:10,) both body and soul, diseased by sin, are to be ultimately restored by the great Physician.