It is narrated from Muhammad bin Abbad bin Ja'far, in mursal form, that the Messenger of Allah (peace and blessings be upon him) sent a message to Quraysh: "After praise (of Allah): if you disown your alliance with Banu Bakr or pay the blood money for (the slain of) Khuza'ah (that is better); otherwise, I declare war on you." At this Qurazah bin Abd Amr bin Nawfal bin Abd Manaf, the father-in-law of Mu'awiyah (may Allah be pleased with him), said: "Banu Bakr are an ill-omened people. We will not pay the blood money for those they have killed; (if we did,) we would be left with 'neither hair nor wool', not a trace of wealth or goods. Nor will we disown our alliance with them, for no one but them remains upon our religion. Rather, we give him notice of war."
This report is mursal (with a missing link), and its chain is sahih (authentic).
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب السيرة والمغازي / 4300
Hadith Gradingمحدثین:إسناده صحيح، مرسل
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :قال ابن حجر: هَذَا مُرْسَلٌ ، صَحِيحٌ إِسْنَادُهُ . » «انفرد به المصنف من هذا الطريق»