Sunan Abi Dawud 1157
سنن أبي داود#1157SahihNarrated AbuUmayr ibn Anas: AbuUmayr reported on the authority of some of his paternal uncles who were Companions of the Prophet (ﷺ): Some men came riding to the Prophet (ﷺ) and testified that they had sighted the new moon the previous day. He (the Holy Prophet), therefore, commanded the people to break the fast and to go out to their place of prayer in the morning
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 2:768