Ibrahim narrates from Masruq (may Allah have mercy on him) that a woman said to her husband: "If the authority that is in your hand were in my hand, I would divorce you." So the husband gave the wife the authority, and she gave herself three divorces. Sayyiduna Umar (may Allah be pleased with him) asked Sayyiduna Abdullah (may Allah be pleased with him) about this, and he said: "It is one divorce, and the husband has more right to that woman." And Sayyiduna Umar (may Allah be pleased with him) said: "That is my view too."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 15037