It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) sent Hazrat Abdullah bin Huzafah (may Allah be pleased with him) to go around Mina and announce that do not fast on these days; the days of Tashreeq are days of eating, drinking, and remembering Allah.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10664
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لضعف صالح