The Prophet 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.
Sunan an-Nasa'i Book 47, Hadith 10
← Previous Hadith The Messenger of Allah distributed (some spoils of war) and gave to some people but withheld from others. I said: "O Messenger of Allah, you gave to so-and-so and so-and-so, and you withheld from so-and-so, who is a beliver." He said: "Do not say 'a believer,' say 'a Muslim.'" Ibn Shihab (one of the narrators) said: The Bedouins say: "We believe".

Sunan an-Nasa'i Book 47, Hadith 9 Next Hadith → The Messenger of Allah said: "The Muslim is the one from whose tongue and hand the people are safe, and the believer is the one from whom the people's lives and wealth are safe."

Sunan an-Nasa'i Book 47, Hadith 11