It is narrated from Imran bin Husain that the Messenger of Allah (ص) said:
"Ali is from me and I am from him, and he is the guardian (Wali) of every believer after me"
Dailami, Ferdaus al-Akhbar, V.2, page 581; Ahmad ibn Hanbal, Musnad, V.4, page 437-438; Tirmidhi, Jam'i as-Sahih V.5, page 296-297; Tabarani, Al-Mu’jam Al-Kabir, V.18, page 128-129; Nisa’i, Khasa’is-e-Amir-ul-Mu’minin (a.s.), page 97-98.
Ibn Athir Jazari (Asad al-Ghabah V.4, page 27) has narrated this hadith as follows:
“Verily Ali is from me and I am from Ali, and he is the guardian of every believer after me.”
Refer to Muttaki Hindi, Kanz al-Ummal, V. 11, page 599, 607-608.