'First Covenant' in the Bible

For if that first covenant had been faultless, there would have been no place sought for a second.

Now even the first covenant had regulations for worship and an earthly sanctuary.

For this reason he is the mediator of a new covenant, that those who are called may receive the promised eternal inheritance, now that he has died as a ransom to set them free from the transgressions committed under the first covenant.

This is why even the first covenant was not ratified without blood.