عَنْ يَوْنُسَ بْنِ شَدَّادٍ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ نَهَى عَنْ صَوْمِ أَيَّامِ التَّشْرِيقِ
It is narrated from Sayyiduna Yunus bin Shaddad (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him and his family) forbade fasting during the days of Tashreeq.