And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel. – Hebrews 12:24

Observe that this “blood of sprinkling” is put in close contact with “the new covenant.” I do not wonder that those who are lax in their views of the atonement have nothing honorable to say concerning the covenants, old or new. The doctrine of the covenants is the marrow of divinity, but these vain-glorious spirits tend to despise it. This is natural, since they speak slightingly of the atonement. What covenant is there without blood? If it is not ratified, if there is no sacrifice to make it sure, then is it no covenant in the sight of God or of enlightened men. But, O beloved, you who know your Lord, and follow on to know Him yet better, to you the covenant of promise is a heritage of joy, and His atonement is most precious as the confirmation of it. To us the sacrificial death of our Lord is not a doctrine, but the doctrine, not an outgrowth of Christian teaching, but the essence and marrow of it. To us Jesus in His atonement, is Alpha and Omega, in Him the covenant begins and ends. You see how it was confirmed by blood. If it is a man’s covenant, if it is confirmed, it stands, but this is God’s covenant, confirmed with promises, oaths and blood, and it stands fast forever and ever. Every believer is as much interested in that covenant as was Abraham the father of believers, for the covenant was made with Abraham and his spiritual seed, and in Christ it is confirmed to all that seed forever by His most precious blood. That, also, is evident enough in the text; fail not to consider it well. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1888.cfm