It is narrated from Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) that he said: "By Allah! Indeed, this is the covenant of the unlettered Prophet (peace and blessings be upon him) (with me): 'Soon after me people will act with disloyalty and treachery towards you.'"
Imam Ahmad narrated this hadith in al-Musnad. According to the hadith scholars there is criticism of it because of some narrators in its chain; however, on the basis of its many routes and supporting reports, some imams have accepted it at the level of hasan (good).
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب المناقب / 3919
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده ضعيف » «أخرجه المستدرك للحاكم برقم: 4701، وأخرجه مسند البزار برقم: 871، وأخرجه المطالب العالية لابن حجر برقم: 3920»