When an animal sacrifice was given for sin it had to die not just bleed. The idea is propitiation, a substitution which is godward, not to man. Its benefit is applied to man because God accepted it. When we confess to God our sin Jesus our high priest applies the blood that was shed at the crucifixion for our sin. It continually cleanses us (1Jn.1:6-9)

Rom. 3:25 “whom God set forth as a propitiation by His blood, through faith, to demonstrate His righteousness, because in His forbearance God had passed over the sins that were previously committed” 

The Passover had real blood from a lamb put on the door of which the angel saw and passed over not judging that house. The application is personal, that we will not be judged because the blood of Jesus is applied to us.

Heb. 2:17 “that He might be a merciful and faithful High Priest in things pertaining to God, to make propitiation for the sins of the people.”

I Jn. 2:2 “And He Himself is the propitiation for our sins, and not for ours only but also for the whole world.”

I Jn. 4:10 “that He loved us and sent His Son to be the propitiation for our sins.”

Notice that each time it is in the context of sins, this is the same principle applied to Isa53:5-6 “But He was wounded for our transgressions, he was bruised for our iniquities; the chastisement for our peace was upon Him, and by His stripes we are healed. All we like sheep have gone astray; we have turned, every one, to his own way; and the LORD has laid on Him the iniquity of us all.

Jesus took our place to be punished as well as deliver us. Gr. hilasmos hilasterion means to expiate or appease. That Jesus satisfied the full demands of God’s righteousness and holiness and justice for his wrath in our place. The atonement was to make payment for our sins unto God the Father. Propitiation for sins is always Godward. The Father accepted his payment, the death of his Son for our sins. It was between God the Father, and the God/man Christ Jesus. It applied to man because God accepted it. This act was done as a Propitiation to the Father 2,000 years ago and is still effective today (Rom.3:25; Heb.2:17 1 Jn.2:2,4:10). When we confess to God our sin Jesus our high priest applies the blood that was shed at the crucifixion for our sin.

The blood sacrifices were for sin:

Heb. 10:6 “In burnt offerings and sacrifices for sin you had no pleasure.”

Heb. 10:18 “Now where there is remission of these, there is no longer an offering for sin.”

Heb. 13:11 “For the bodies of those animals, whose blood is brought into the sanctuary by the high priest for sin”

1 Cor. 15:3 “that Christ died for our sins according to the Scriptures” Gal. 1:4: “who gave Himself for our sins.” It cannot be any clearer, the Scripture is consistent on the reason Jesus died.

Many claim the blood provides for us far more than forgiveness and cleansing from sin. They claim it for protection, believing that it reaches into the spiritual world protecting us from any harm. They claim it can give us healing, joy, peace and a host of other benefits (even success). The implication seems to be that the blood of Jesus has spiritual life and power far more than for our sin. Are there any biblical examples of this? Did Paul or any apostle in the New Testament teach the believer to “plead the blood of Jesus,” or use the blood to repel demons? No. There are no examples of using the blood of Jesus in this manner in the New Testament. This teaching is not based on the word but more made up spiritual view that is often found in the occult or mysticism. Why teach what is not found in Scripture as if it is. People convince themselves it is a religious practice that will give them power, it become one more akin to tradition and superstition than a truthful practice of the word.