It was narrated from Ibn 'Abbas (رضي الله عنه) concerning the verse,

"So if they come to you (O Muhammad (ﷺ)), either judge between them, or turn away from them. If you turn away from them, they cannot hurt you in the least. And if you judge, judge with justice between them. Verily, Allah loves those who act justly" (al-Ma'idah 5:42) that he said: If Banun-Nadeer killed a man of Banu Quraizah, they would pay them half a diyuh, but if Banu Quraizah killed a man of Banun-Nadeer, they would pay them the diyah in full. But the Messenger of Allah (ﷺ) made the diyah the same for both.