The phrase 'pleading the blood' is often used by Christians.
What does it mean to plead the blood of Jesus?
Pleading the blood simply means applying the blood to our life and circumstances just like the Israelites applied it to their door posts and were protected from the destroyer (Exodus 12).
Pleading the blood is simply the taking hold of the authority and power available to us by the death and resurrection of Jesus.
How do we plead the blood of Jesus?
Revelation 12:11 They overcame him by the blood of the Lamb and by the word of their testimony; they did not love their lives so much as to shrink from death. (NIV)
Speaking with our mouths is important in enforcing our victory (Romans 10:10).
We plead the blood by confessing the salvation and deliverance the blood has brought us.
Let's use a simple illustration to drive home this point.
Imagine the world as a big courtroom.
God is the Judge sitting on the throne (Hebrews 12:23)
Jesus is your advocate, standing beside you to argue your case (1John 2:1) He reminds the Judge that He died and shed His blood for you.
The devil, satan, is your accuser bringing charges and even attacks against you (Revelation 12:10, Zechariah 3:1)
When an accusation is brought against a person in a law court the defendant, if innocent, can greatly increase His or her chances of being acquitted by producing a reliable witness.
Here lies the power of pleading the blood.
Although we were not physically there when Jesus died, His shed blood bears witness to the fact that He died, rose again and defeated the powers of darkness (Colossians 2: 15). All witnesses need to speak. Remember the blood is living and speaks (Hebrews 12: 24). When we actively plead (speak out) the blood into the negative circumstances and attacks satan brings against us, we are bringing a powerful witness to speak on our behalf (1 John 5:8).
Pleading or speaking the blood causes the blood of Jesus to speak out on our behalf and stops the attacks of satan. Any time you sense the hosts of darkness coming against you plead the blood of Jesus against.
You can use whatever words the Holy Spirit lays on your heart to do this. A good example is below.
"Your forces of darkness attacking my home and life, I command you to stop in Jesus name. I hold the blood of Jesus against you. The blood of Jesus has defeated you. The blood of Jesus has set me free. The blood of Jesus avails for me. I plead the blood of Jesus over my home, my life and my family. I protect them from your attacks. I walk in the freedom Jesus' death has brought me. Amen"