It is narrated from Ikrimah bin Khalid that the son of Umm Hakim, during his illness, said to his wife that she should give something to him from his inheritance, but the woman refused. So the son of Umm Hakim said, "I will include in this inheritance those who will diminish your right or prove harmful in it." Therefore, during his illness, he married three women, and gave each of them a dowry of one thousand. Abdul Malik bin Marwan declared this permissible. Saeed bin Salim says, "If the dowry of these women is equal to the customary dowry, then it is valid, and if it is more than the customary amount, then the excess should be returned."
Hadith Referenceمسند الإمام الشافعي / كتاب النكاح / 1120
Hadith Takhrijاسناده ضعيف لعنعة ابن جريج: اخرجه البيهقي في المعرفة السنن والآثار (3929)۔