It was narrated from Ibn 'Umar,:
from the Prophet, concerning a man who had a wife then divorced her, then another man married her but divorced her before consummating the marriage. Could she go back to the first man? He said: “No, not until he tastes her sweetness.”

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ عَلْقَمَةَ بْنِ مَرْثَدٍ، قَالَ سَمِعْتُ سَالِمَ بْنَ رَزِينٍ، يُحَدِّثُ عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ ﷺ فِي الرَّجُلِ تَكُونُ لَهُ الْمَرْأَةُ فَيُطَلِّقُهَا فَيَتَزَوَّجُهَا رَجُلٌ فَيُطَلِّقُهَا قَبْلَ أَنْ يَدْخُلَ بِهَا أَتَرْجِعُ إِلَى الأَوَّلِ قَالَ " لاَ . حَتَّى يَذُوقَ الْعُسَيْلَةَ " .