The Messenger of Allah ﷺ sent Abdullah bin Huzafa to go around Mina announcing, "Do not fast on these days, for they are days of eating, drinking, and remembrance of Allah ."
حدثنا روح حدثنا صالح حدثنا ابن شهاب عن سعيد بن المسيب
أن رسول الله ﷺ بعث عبد الله بن حذافة يطوف في منى أن لا تصوموا هذه الأيام فإنها أيام أكل وشرب وذكر الله عز وجل
Its isnad is hasan, on account of Salih bin Abu Akhdar. Abu Dawud narrated it, 2813, in the chapter on sacrifices, on keeping the meat of sacrifices, and Tirmidhi, 3/134, number 773, and he said, hasan sahih, and its wording is similar.