Hasan al-Basri (may Allah have mercy on him) said: "If a husband says to his wife: 'You are free,' and intends divorce by it, then one divorce will be counted and the husband will have the right to take her back."
Hadith Referenceسنن سعید بن منصور / كتاب الطلاق / 3330
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 2153، وابن أبى شيبة فى «مصنفه» برقم: 18286»