It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that if a man brings a woman into his marriage and then divorces her and claims that he did not touch her, then half of the dowry will be obligatory upon him.
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 1949
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 772، والبيهقي فى«سننه الكبير» برقم: 14588»