The hyssop used in sprinkling the blood was the symbol of purification, being thus employed in the cleansing of the leper and of those defiled by contact with the dead. In the psalmist's prayer also its significance is seen: "Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow." Psalm 51:7. The lamb was to be prepared whole, not a bone of it being broken: so not a bone was to be broken of the Lamb of God, who was to die for us. John 19:36. Thus was also represented the completeness of Christ's sacrifice.

Ysoppen, der brugtes til at stryge blodet på med, var et symbol på renselse. Den blev brugt til at rense de spedalske og de mennesker, der havde været i berøring med de døde. I Salmistens bøn ser man også dens betydning: "Rens mig for synd med ysop, tvæt mig hvidere end sne." Sl. 51, 9. Lammet skulle tilberedes helt, ikke et ben måtte knuses. På samme måde skulle der ikke knuses et ben på Guds Lam, der skulle dø for os. Joh. 19, 36. Derved blev der også givet et billede på Kristi offers fuldkommenhed.