Maliks Muwatta Book 28, Hadith Number 18.
Section : Marriage of the Muhallil and its Like.
Yahya related to me from Malik from Yahya ibn Said from al-Qasim ibn Muhammad that A’isha, the wife of the Prophet, may Allah bless him and grant him peace, said when asked whether it was permissible for a man to marry again a wife he had divorced irrevocably if she had married another man who divorced her before consummating the marriage, “Not until she has tasted the sweetness of intercourse.”