Hadith 10:152
Abu Bakr narrated to us, he said: Yazid ibn Harun narrated to us, from Hammad ibn Salamah, from Dawud, from al-Sha'bi, who said: If it is said to her, "You are divorced, you are divorced, you are divorced," before he has consummated the marriage with her, then she has become forbidden [to him].
حدثنا أبو بكر قال نا يزيد بن هارون عن حماد بن سلمة عن داود عن الشعبي قال إذا قيل لها أنت طالق أنت طالق أنت طالق قبل أن يدخل بها فقد حرمت