Sayyiduna Anas (may Allah be pleased with him) reports that the Prophet (peace and blessings be upon him) said: "Remorse is repentance."
Al-Bazzar recorded it from his teacher Amr bin Malik al-Ruwasi, whom more than one scholar declared da'if (weak), while Ibn Hibban declared him thiqah (trustworthy) and said: He narrates unusual (gharib) reports and makes mistakes. The rest of its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التوبة / 17517
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه البزار فى المسند (3239) ، أخرجه شرح السنة برقم: 1307»