Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) says: The Prophet (peace and blessings be upon him) stood up among us and told us about the matters that were to occur in his Ummah until the Day of Resurrection. Whoever was to retain it retained it, and whoever was to forget it forgot it.
Imam Ahmad and al-Tabarani recorded it; Imam Ahmad's narrators are the narrators of the Sahih, except Umar bin Ibrahim bin Muhammad, and Ibn Hibban declared him thiqah (trustworthy).