It was narrated from 'Aishah that a man divorced his wife three times and she married another husband who divorced her, before having intercourse with her. The Messenger of Allah was asked:
"Is she permissible for the first (husband to remarry her)?" He said: "No, not until he tastes her sweetness as the first tasted her sweetness."
Reference: Sunan an-Nasa'i 3412 In-book : Book 27, Hadith 24 English translation : Vol. 4, Book 27, Hadith 3441
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