The Prophet (ﷺ) as saying: When the night approaches from this side and the day retreats on that side, and the sun sets - according to the version of Musaddad - he who fasts has reached the time to break it.
Reference: Sunan Abi Dawud 2351 In-book : Book 14, Hadith 39 English translation : Book 13, Hadith 2344
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