It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Indeed, a single good trait may be found in a man, and because of it Allah, the Mighty and Majestic, sets right all his deeds; and a man's purification for his prayer is (such a deed that) through it Allah wipes out his sins, and his prayer remains for him as a supererogatory act (extra reward)."
This hadith is not narrated from the Messenger of Allah (peace and blessings be upon him) except with this chain, and no one narrated it from Thabit (may Allah have mercy on him) except Bashshar bin al-Hakam (may Allah have mercy on him).
Hadith Referenceالمعجم الأوسط / باب الألف / 2006
Hadith Takhrij«أخرجه أبو يعلى فى «مسنده» برقم: 3297، والبزار فى «مسنده» برقم: 7000، وابن حجر فى «المطالب العالية» برقم: 82 / 1، 82 / 2، والطبراني فى «الأوسط» برقم: 7102»