Muwatta Malik 1216
موطأ مالك#1216SahihYahya related to me from Malik from Nafi that Abdullah ibn Umar said, "When a man divorces his wife and she begins her third period, she is free from him and he is free from her." Malik said, "This is how things are done among us
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMauquf Sahih
In-book reference: 29:13