'Avenge the Blood of' in the Bible

So when Abner returned to Hebron, Joab took him aside to the middle of the gate to speak to him privately, and there he struck Abner in the abdomen so that he died, to avenge the blood of Asahel, Joab’s brother.

You shall strike the house of Ahab your master, so that I may avenge the blood of My servants the prophets, and the blood of all the servants of the Lord, [who have died] at the hands of Jezebel.

And the Lord said to him, “Name him Jezreel; for yet in a little while I will avenge the blood [that was shed in the Valley] of Jezreel and inflict the punishment for it on the house of Jehu, and I will put an end to the kingdom of the house of Israel.