Hazrat Zir bin Hubaish (may Allah have mercy on him) narrates that Hazrat Ali (may Allah be pleased with him) said: By the One Who split the grain and created the human being, surely the unlettered Prophet صلی اللہ علیہ وسلم made a covenant with me that only a sincere believer will love me, and only a hypocrite will harbor enmity towards me.