He said: Abu ALI al-Hasan b. Abdillah al-Qattan reported to me from Abu Amru Uthman b. Ahmad, who reported to me from Ahmad b. al-Husain, who reported from Ibrahim b. Muhammad b. Bassam, from ALI b. al-Hakam, from al-Laith b. Sa'd, from Abu Saeed al-Khudari, who said:
The PROPHET (SAWW) , peace be upon him and his progeny, said: "O people, love ALI (ASWS) because his flesh is my flesh, his blood is my blood. May ALLAH (SWT) curse those people who have reneged from the covenant with me about him, and forgotten my parting counsel about him; and they have no share (of blessings) from ALLAH (SWT)."
(Ref Al Amali Shaikh Mufeed The Thirty Fifth Assembly Hadees No.4)