It was narrated that 'Aishah said: "The Messenger of Allah was asked about a man who divorced his wife, and she married another man who had a closed meeting with her then divorced her, before having intercourse with her. Is it permissible for her to remarry the first husband? The Messenger of Allah said: “No, not until the second one tastes her sweetness and she tastes his sweetness”"
SahihSahihSahihBook 27 · Hadith 19