Nubaishah Al-Hudhali (RAA) narrated that The Messenger of Allah ( صلی اللہ علیہ وسلم ) said:“The days of Tashriq (the three days following 'Idul Ad-ha, i.e. 11th , 12th and 13th of Dhul Hijjah) are days of eating, drinking and remembering (dhikr) of Allah, the Most Great and Glorious." Related by Muslim.