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 رَسُولَ اللهِ ﷺ أَمَرَ أَنْ يُنَادَى أَيَّامَ التَّشْرِيقِ أَنَّهُ لَا يَدْخُلُ الْجَنَّةَ إِلَّا مُؤْمِنٌ وَهِيَ أَيَّامُ أَكْلٍ وَشُرْبٍ  

[Machine] The Messenger of Allah ﷺ gave a sermon during the days of Tashreeq and mentioned something like this: "Indeed, these are days of eating and drinking."  

خَطَبَ رَسُولُ اللهِ ﷺ فِي أَيَّامِالتَّشْرِيقِ فَذَكَرَ نَحْوَهُ وَقَالَ إِنَّ هَذِهِ أَيَّامُ أَكْلٍ وَشُرْبٍ