“My paternal
uncles
among the Ansar who were among the Companions of the Messenger
of
Allah (ﷺ) told me: ‘The new crescent of Shawwal was covered with
clouds, so we fasted the next day. Then some riders came at the end
of the day and testified to the Prophet (ﷺ) that they had seen the
new crescent the night before. The Messenger of Allah (ﷺ) commanded
them to break their fast and to go out to offer the ‘Eid prayer the
following morning.’”
Sunan Ibn Majah Book 7, Hadith 16