Al-Matalib al-'Aliyah 4386 — The killing of Uthman bin Affan

It is narrated from Abu Maryam bin Radi' al-Jarud (may Allah have mercy on him) that he said: I was in Kufah when Sayyiduna al-Hasan bin Ali (may Allah be pleased with them both) stood up to deliver a sermon and said: "O people! Last night I saw a strange thing in my dream! I saw the Lord, the Blessed and Exalted, above His Throne. Then the Messenger of Allah (peace and blessings be upon him) came until he stood beside one of the pillars of the Throne. Then Sayyiduna Abu Bakr (may Allah be pleased with him) came and placed his hand on the shoulder of the Messenger of Allah (peace and blessings be upon him). Then Sayyiduna Umar (may Allah be pleased with him) came and placed his hand on the shoulder of Sayyiduna Abu Bakr (may Allah be pleased with him). Then Sayyiduna Uthman (may Allah be pleased with him) came, and he was standing to one side at a little distance (from them all). He submitted: 'O my Lord! Ask Your servants for what crime they killed me.'" The narrator stated that then two spouts of blood began to flow from the heavens to the earth. The narrator says: Then it was said to Sayyiduna Ali (may Allah be pleased with him) (by way of objection): Do you not see what al-Hasan is relating? He said: "He is relating what he saw (in his dream)."
This narration is in the Musnad of Abu Ya'la (al-Matalib al-'Aliyah: 4386). There is criticism of its chain because of Ibn Abi Fadalah (Mubarak bin Fadalah); moreover, beliefs or shar'i rulings are not established on the basis of dreams; rather, these are reported merely as glad tidings or warnings.