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)
أن رَسُولَ اللَّهِ ﷺ أَمَرَهُ أَوْ أَمَرَ رَجُلًا يُنَادِي أَيَّامَ التَّشْرِيقِ «أَنَّهُ لَا يَدْخُلُ الْجَنَّةَ إِلَّا مُؤْمِنٌ وَهِيَ أَيَّامُ أَكْلٍ وَشُرْبٍ»