Abdur Rahman bin Mahdi عبد الرحمن بن مهدي · The Book of Divorce

It was narrated from Ibn 'Umar that he divorced his wife when she was menstruating, but the Messenger of Allah told him to take her back, and divorce her when she was pure (not menstruating).

"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."

"O Messenger of Allah, she is lying; he is having intercourse with her, but she wants to go back to her first husband." The Messenger of Allah said: "She cannot do that until she tastes his sweetness."

"The envoy of the Messenger of Allah came to me and said: 'Keep away from your wife.' I said: 'Should I divorce her?' He said: 'No, but do not approach her.'" And he (the narrator) did not mention (the words): "Go to your family."

"The Messenger of Allah gave his wives the choice; was that a divorce?"

"It is not permissible for a woman who believes in Allah and the Last Day to mourn for more than three days, except for her husband."