Hebrews 9:18

Whereupon neither the first testament was dedicated without blood.

Neither testament is put into force without blood, and the first was inaugurated and dedicated with blood involving a sacrificial death. That first covenant was the one made with Israel at Sinai and then ratified by the blood of a sacrifice. It belongs to the account of the earthly sanctuary and its furnishings, set in contrast to the heavenly sanctuary where Jesus ministers.

The animal offerings belonged to the sacrificial system that foreshadowed Christ's offering of His own life, and at His death the type met its fulfillment so that animal sacrifices no longer had value. The covenant made with Adam in Eden and renewed to Abraham existed from the first promise of redemption and was accepted by faith, yet it could not be ratified until the death of Christ. The new covenant is likewise ratified by Christ's blood, and it is called the second or new covenant because the blood by which it was sealed was shed after the blood of the first covenant. The law of God was the basis of this covenant, which is an arrangement for bringing people back into harmony with the divine will so they can obey God's law. The bread and wine keep Christ's individual sacrifice before His disciples and point to the blessings of the covenant, including becoming God's children and Christ's co-heirs.