Zahdam bin al-Harith al-Ghifari said that Sayyiduna Uhban bin Sayfi (may Allah be pleased with him) told me: The Messenger of Allah (peace and blessings be upon him) said to me: "O Uhban, listen: if you remain alive after me, you will see disagreement among my Companions. If you remain alive until that day, make your sword out of palm stalks." He said: So I made my sword out of palm stalks. Then Sayyiduna Ali (may Allah be pleased with him) came to me, took hold of the two doorposts, then gave greetings and said: O Uhban, will you not come out? I said: May my father and mother be ransomed for you, O Abu al-Hasan! The Messenger of Allah (peace and blessings be upon him) said to me, or commanded me, or advised me, or told me this beforehand (Ibn Zahdam was in doubt), he (peace and blessings be upon him) said: "O Uhban, if you remain alive after me, you will see disagreement among my Companions. If you remain alive until that day, make your sword out of palm stalks." So I brought out my sword to show him, and Sayyiduna Ali (may Allah be pleased with him) turned away.
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 864