Ibrahim (may Allah have mercy on him) said: When a man says to his wife: "I have granted you khul‘," even though he has not actually granted khul‘, then khul‘ takes place at that very moment and the man retains no right over her.
Hadith Referenceسنن سعید بن منصور / كتاب الطلاق / 2598
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 1420، 1421، وابن أبى شيبة فى «مصنفه» برقم: 19543»