Abu Salamah al-Fazari (may Allah have mercy on him) narrates: I heard Sayyiduna Anas bin Malik (may Allah be pleased with him) say: "No one from Banu Umayyah will rule for a year except that the descendants of al-Abbas will rule for two years." One of the men sitting with him said to him: "O Abu Hamzah! Did the Messenger of Allah (peace and blessings be upon him) say this?" He said: "Yes, it is as certain as the fact that you are here."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) only with this chain; Bakr bin Yunus bin Bukayr is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 5711
Hadith Gradingمحدثین:إسناده ضعيف لضعف بكر بن يونس
Hadith Takhrij«قال الهيثمي: وفيه بكر بن يونس وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 5، ص 187»»