Hadith 10:647
Abu Bakr narrated to us, he said: Hafs narrated to us, from Layth, from al-Hakam, regarding a man who said to his wife, "You are divorced," and gestured with his hand three times. He said: So they asked him about that, and he said: "It is one."
حدثنا أبو بكر قال نا حفص عن ليث عن الحكم في رجل قال لأمرأته أنت طالق وأشار بيده ثلاثا قال فسألوه عن ذلك فقال هي واحدة