Sayyiduna Anas (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "The two guardian angels present to Allah Almighty what they record in a day. If Allah Almighty sees seeking of forgiveness at the beginning and at the end of that record, Allah Almighty says: 'I have forgiven My servant for the matters between the two ends of this record.'"
Al-Bazzar recorded it; its chain contains a narrator, Tammam bin Najih, whom Yahya bin Ma'in and others declared thiqah (trustworthy), while Bukhari (may Allah have mercy on him) and others called him da'if (weak), and the rest of its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التوبة / 17580