The Prophet [SAW] commanded him to call out on the days of At-Tashriq that no one would enter Paradise except a believer, and that these were the days of eating and drinking. (Using translation from Nasāʾī 4994)
أَنَّ النَّبِيَّ ﷺ «أَمْرَهُ أَنْ يُنَادِيَ أَيَّامَ التَّشْرِيقِ إِنَّهَا أَيَّامُ أَكْلٍ وَشُرْبٍ وَإِنَّ الْجَنَّةَ لَا يَدْخُلُهَا إِلَّا مُؤْمِنٌ»