Ibn Abbas – I asked the Prophet (s.a.w.a.) about the words through which Adam’s (a.s.) prayers were accepted when he repented. The Prophet (s.a.w.a.) replied – Adam (a.s.) asked Allah to accept his repentance for the sake of Muhammad (s.a.w.a.), Ali (a.s.), Fatimah (s.a.), Hasan (a.s.) and Husain (a.s.).
Al-Khesaal chap 5 trad 8