Sayyiduna Suhayb bin Sinan (may Allah be pleased with him) narrates from the Messenger of Allah (peace and blessings be upon him): "Whoever fixes a dowry for a woman while Allah knows that he does not intend to pay it to her has deceived her in the name of Allah and made her private part lawful for himself by falsehood; he will meet Allah on the Day of Resurrection as a fornicator."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14397