“You should avoid shedding blood without justification, because nothing is more inviting of Divine retribution, greater in (evil) consequence, and more effective in the decline of prosperity and cutting short of life than the shedding of blood without justification. On the Day of Judgement Allah the Glorified, would commence giving His judgement among the people with the cases of bloodshed committed by them.”
Nahjul-Balagha Part 2: Letters and saying, Letter 53, an order to Malik Al-Ashtar
