‏البر والصلة والآداب‏ : Hadeeth No:6280 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: It does not seem proper for Siddiq that he should be an invoker of curse. This hadith has been narrated on the authority of Abu Kuraib with the same chain of transmitters....

‏الأيمان : Hadeeth No:4091 This hadith has been narrated on the authority of Ibn Ghazwan (and the words are):" I heard Abu'l-Qasim (sallAllaahu alayhi wa sallam) as the Prophet of repentance."...