Ibn Ka'b b. Malik reported on the authority of his father that the Messenger of Allah (ﷺ) sent him and Aus b. Hadathan during the days of Tashriq to make this announcement:None but the believer would be admitted into Paradise, and the days of Mina' are the days meant for eating and drinking

This hadith has been narrated on the authority of Ibrahim b. Tahman with the same chain of transmitters but with this variation that he said:Both of them made the announcement