Hadith #4494 (Sunan Abi Dawud)
Book: Types of Blood-Wit (Kitab Al-Diyat)
Narrator(s): Abu Sharih al-Khuza'i,al-Ka'bi, al-Harith bin Fadayl al-Ansari الحارث بن فضيل الأنصاري الخطمي, Hammad bin Zayd حماد بن زيد بن درهم الأزدي الأزرق, Ibn Ishaq محمد بن إسحاق بن يسار‎, Musa bin Isma'il al-Munqari al-Tabudhaki موسى بن إسماعيل المنقري - لتبوذكي, Sufyan bin Abi al-Wja'a سفيان بن أبي العوجاء
Grade: Sahih

Qurayzah and Nadir (were two Jewish tribes). An-Nadir were nobler than Qurayzah. When a man of Qurayzah killed a man of an-Nadir, he would be killed. But if a man of an-Nadir killed a man of Qurayzah, a hundred wasq of dates would be paid as blood-money. When Prophethood was bestowed upon the Prophet (ﷺ), a man of an-Nadir killed a man of Qurayzah.
They said: Give him to us, we shall kill him. They replied: We have the Prophet (ﷺ) between you and us. So they came to him.
Thereupon the following verse was revealed: “If thou judge, judge in equity between them.” “In equity” means life for a life.
The following verse was then revealed: “Do they seek of a judgment of (the days) ignorance?”
Abu Dawud said: Quraizah and al-Nadir were the descendants of Harun the Prophet (peace be upon him)

Source: https://parallelquran.com/hadith/sunan-abi-dawud-4494/