It is narrated from Ibn Umar (may Allah be pleased with them both) that he used to say: "Every divorced woman is entitled to mut‘ah (a parting gift) except for the woman whose dowry has been fixed and then she is divorced before consummation; in that case, half of her dowry will be counted for her."
Hadith Referenceمسند الإمام الشافعي / كتاب الطلاق / 1272
Hadith Takhrijاسناده صحیح اخرجه البيهقي : 7/257 - وفى المعرفة السنن والآثار له (4332)- ومالك في الموطأ، الطلاق، باب ما جاء في متعة الطلاق۔