The Messenger of Allah ﷺ said, "The most insolent of people toward Allah are three: a man who kills someone other than his killer, a man who seeks vengeance among the people of Islam for blood spilled in the days of ignorance, and a man who claims his eyes saw in a dream what they did not see."
قال رسول الله ﷺ: إن أعتى الناس على الله من قتل غير قاتله، ومن طلب بدم الجاهلية من أهل الإسلام، ومن بصر عينيه في المنام ما لم تبصر.
Ahmad (16378), Tabarani in Al-Kabir (191/22), Ibn Abu Asim in Diyat (225), Daraqutni (96/3), and Hakim (349/4) all narrated it, all of them through the hadith of Abdul-Rahman bin Ishaq, from Zuhri, from Ata bin Yazid Laythi, from Abu Shurayh, and he related it. Hakim said, "Its isnad is sahih, except that Yunus bin Ubayd narrated it from Zuhri with a different isnad." I say, its isnad is hasan because of Abdul-Rahman bin Ishaq bin Abdullah bin Harith Madani, for there is disagreement about him, though his hadith is hasan.Yunus bin Yazid corroborated him. Ahmad (16376) narrated it at length within the sermon of the Day of the Conquest, and Ibn Abu Asim in Diyat (227), Hakim (349/4), and Bayhaqi (8/71) all narrated it through the route of Yunus bin Yazid, from Zuhri, from Muslim bin Yazid, one of Banu Saad bin Bakr, that he heard Abu Shurayh Khuzai relate the hadith, both at length and in brief.In it appears, "The Messenger of Allah ﷺ permitted us on the Day of the Conquest to fight Banu Bakr, until we had taken our revenge upon them, while he was in Makkah. Then the Messenger of Allah ﷺ ordered that the sword be put away. The next day, a group of us encountered a man from Huzayl in the sanctuary, heading toward the Messenger of Allah ﷺ to accept Islam. He had killed a kinsman of theirs during the pre-Islamic era, and they had been seeking him, so they killed him..... Then the Messenger of Allah ﷺ said, 'By Allah, I will indeed pay the blood money for this man whom you killed.'" So the Messenger of Allah ﷺ paid his blood money. And in it, "A man sought revenge for a dhahl from the pre-Islamic era."Muslim bin Yazid is among the narrators of Tajil (1036), and Ibn Hajar referred to this hadith, in which Zuhri said, "Muslim narrated to me that Abu Shurayh Khuzai informed him." This confirms that Zuhri heard this hadith from both sheikhs, Ata bin Yazid Laythi and Muslim bin Yazid.Except that Bukhari said in Tarikh al-Kabir (277/7), "Some people attributed his hadith to Ata bin Yazid, but that is not correct." Then he narrated the hadith through the route of Yunus, from Ibn Shihab, and through the route of Abdul-Rahman bin Ishaq, from Zuhri, then said, "The first is more sahih." Some have found fault with it because of the discrepancy over Zuhri, but reconciliation between the two is possible.As for his statement, "bidhahl al-jahiliyyah," dhahl means revenge.