It is narrated from Sayyiduna al-Bara' bin Azib (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever fasts a day and does not tear it (with sins), ten good deeds are written for him."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Talhah bin Musarrif (may Allah have mercy on him) except Abu Janab (may Allah have mercy on him), and no one from Abu Janab (may Allah have mercy on him) except Ishaq al-Azraq (may Allah have mercy on him), and Abd al-Rahman bin Abd al-Wahhab (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 7502
Hadith Gradingمحدثین:إسناده ضعيف لتدليس أبي جناب
Hadith Takhrij«قال الهيثمي: فيه أبو جناب وهو ثقة ولكنه مدلس «مجمع الزوائد ومنبع الفوائد، ج 3، ص 171»»