It is quoted on the authority of hazrat habshi bin Janaada (رحمتہ اللہ علیہ) that he says that, hazrat Muhammad (صلی اللہ علیہ وسلم) said, “Ali (رحمتہ اللہ علیہ) is from me and I am from Ali              (رحمتہ اللہ علیہ). And no one can fulfill responsibility on my behalf (in terms of pacts and agreements) except me and Ali.” (Imaam Tirmidhi, Ibn-e-Maaja, Imaam Ahmad).

It is quoted on the authority of Hazrat Zar bin Hubaish (رحمتہ اللہ علیہ) that hazrat Ali

  (رحمتہ اللہ علیہ) said, “I swear upon Allah, who tore the seed (and created crops and plants with that) and who created animals, that Hazrat Muhammad (صلی اللہ علیہ وسلم) has made an agreement with me that only a believer will love me and a hypocrite will be spiteful of me.” (Imaam Nisaai, Imaam Muslim, Ibn-e-Habaan)

It is quoted on the authority of Hazrat Jaabir bin Abdullah (رحمتہ اللہ علیہ). He says that I heard Hazrat Muhammad (صلی اللہ علیہ وسلم) People have different kinships and bondings, whereas I (صلی اللہ علیہ وسلم)  and Ali رحمتہ اللہ علیہ belong to the same bond. (Imam Tibraani)