It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When twelve men of Banu Amr bin Ka'b have perished, there will be head-splitting and fighting (among the people) until the Hour is established."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu al-Tufayl except Ibn Khuthaym, nor from Ibn Khuthaym except Dhawwad bin Ulbah, nor from Dhawwad except Isma'il bin Dhawwad."
Hadith Referenceالمعجم الأوسط / باب العين / 3853
Hadith Gradingمحدثین:إسناده ضعيف جدًّا، فيه ذؤاد بن علبة وإسماعيل بن ذؤاد
Hadith Takhrij«قال الهيثمي: فيه ذؤاد بن علبة وهو ضعيف وإسماعيل بن ذؤاد تلميذه ضعيف جدا أيضا «مجمع الزوائد ومنبع الفوائد، ج 5، ص 190»»