Now may the God of peace [the source of serenity and spiritual well-being] who brought up from the dead our Lord Jesus, the great Shepherd of the sheep, through the blood that sealed and ratified the eternal covenant,

As for you also, because of the blood of My covenant with you [My chosen people, the covenant that was sealed with blood]
I have freed your prisoners from the waterless pit.

for this is My blood of the [new and better] covenant, which [ratifies the agreement and] is being poured out for many [as a substitutionary atonement] for the forgiveness of sins.

Testament

For where there is a will and testament involved, the death of the one who made it must be established,

They went to Joshua in the camp at Gilgal and said to him and the men of Israel, “We have come from a far country; so now, make a covenant (treaty) with us.”

General references

The priest shall take cedar wood and hyssop and scarlet [material] and cast them into the midst of the burning heifer.

The Lord our God made a covenant with us at Horeb.