It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The days of Tashriq are days of eating and drinking, so let no one fast on them."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ash'ath except Sharik, and no one from Sharik except Husayn bin al-Ashqar, while Ahmad bin Abdah is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 2860
Hadith Takhrij«أخرجه النسائي فى «السنن الكبرى» برقم: 2911، 2914، والدارمي فى «مسنده» برقم: 1808، والطبراني فى «الكبير» برقم: 14319، 14398»