Sayyiduna Abu Rafi' (may Allah be pleased with him) narrates: When Sayyiduna Ali (may Allah be pleased with him) killed the standard-bearers, Sayyiduna Jibril (peace be upon him) said: "O Messenger of Allah! This is true brotherly solidarity." The Prophet (peace and blessings be upon him) said: "He is from me and I am from him." Sayyiduna Jibril said: "O Messenger of Allah! And I am from you both."
Al-Tabarani recorded it; its chain contains Hibban bin Ali, who is da'if (weak), though according to one report Yahya bin Ma'in declared him thiqah (trustworthy). Muhammad bin Ubaydullah bin Abi Rafi' is da'if (weak) according to the majority, while Ibn Hibban declared him thiqah (trustworthy).