Sayyidah Umm al-Fadl bint al-Harith (may Allah be pleased with her), who is the mother of the children of Sayyiduna Abbas (may Allah be pleased with him) and the sister of Sayyidah Maymunah (may Allah be pleased with her), narrates: I came to the Prophet (peace and blessings be upon him) during his illness and began to weep. The Prophet (peace and blessings be upon him) raised his head and asked: "Why are you weeping?" I said: "We are afraid for you, and we do not know, O Messenger of Allah, what situation we will face from the people after you." The Prophet (peace and blessings be upon him) said: "You will be the weak ones after me."
Ahmad recorded it; its chain contains a narrator, Yazid bin Abi Ziyad, whom a group declared da'if (weak).