Some people saw the crescent moon and came to the Prophet (ﷺ), and he told them to break their fast after the sun has risen and to go out for 'Eid the (morning of the) following day.
Sunan an-Nasa'i Book 19, Hadith 2
← Previous Hadith "The people of the Jahiliyyah had two days each year when they would play. When the Messenger of Allah (ﷺ) came to Al-Madinah he said: 'You had two days when you would play, but Allah (SWT) has given Muslims something instead that is better than them: the day of Al-Fitr and the day of Al-Adha.'"

Sunan an-Nasa'i Book 19, Hadith 1 Next Hadith → "Umm 'Atiyyah would never mention the Messenger of Allah (ﷺ) without saying: 'May my father be ransomed for him.' I said: 'Did you hear the Messenger of Allah (ﷺ) say such-and-such?' And she said: 'Yes, may my father be ransomed for him.' He said: Let the adolescent girls, women in seclusion and menstruating women come out and attend the 'Eid and supplications of the Muslims, but let the menstruating women keep away from the prayer place."

Sunan an-Nasa'i Book 19, Hadith 3