'Blood' in the Bible

"Tell all the leaders of Shechem this: 'Why would you want to have seventy men, all Jerub-Baal's sons, ruling over you, when you can have just one ruler? Recall that I am your own flesh and blood.'"

He did this so the violent deaths of Jerub-Baal's seventy sons might be avenged and Abimelech, their half-brother who murdered them, might have to pay for their spilled blood, along with the leaders of Shechem who helped him murder them.