The Office of the Judge (Kitab Al-Aqdiyah)

Dawud :: Book 24 : Hadith 3584

Narrated Abdullah ibn Abbas:

When this verse was revealed: "If they do come to thee, either judge between them, or decline to interfere....If thou judge, judge in equity between them." Banu an-Nadir used to pay half blood-money if they killed any-one from Banu Qurayzah. When Banu Qurayzah killed anyone from Banu an-Nadir, they would pay full blood-money. So the Apostle of Allah (peace_be_upon_him) made it equal between them.