Hazrat Hammad (may Allah have mercy on him) said: "If someone divorces after marriage but before consummation, and then, assuming he can take her back, has intercourse with her, then both the full dower and half dower will become obligatory upon him."
Hadith Referenceسنن سعید بن منصور / كتاب الطلاق / 2971
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 1794، وعبد الرزاق فى «مصنفه» برقم: 11088»