Sayyiduna Salman (may Allah be pleased with him) narrates: I said: "O Messenger of Allah! Every prophet has a wasi (executor of his will); who is your wasi?" The Prophet (peace and blessings be upon him) remained silent. Afterwards, when he saw me, he said: "O Salman!" I hurried to him and said: "Here I am at your service." The Prophet (peace and blessings be upon him) said: "Do you know who the wasi of Sayyiduna Musa (peace be upon him) was?" He replied: "Yes! It was Sayyiduna Yusha' bin Nun (peace be upon him)." The Prophet (peace and blessings be upon him) asked: "Why was it he?" I said: "Because at that time he was the most knowledgeable of them." The Prophet (peace and blessings be upon him) said: "My wasi, the keeper of my secret, and the best of those I will leave behind after me, the one who will fulfil my promise and pay my debt, is Ali bin Abi Talib."
Al-Tabarani recorded it, and he said: The saying of the Prophet (peace and blessings be upon him), "My wasi," means that the Prophet (peace and blessings be upon him) appointed him as his executor regarding his family; it does not mean that he appointed him regarding the caliphate. And the saying of the Prophet (peace and blessings be upon him), "The best of those I will leave behind after me," means from among his household. Its chain contains Nasih bin Abdullah, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 14668
Hadith Gradingمحدثین:ضعیف جداً
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (6063)»