Al-Qasim bin Muhammad (may Allah have mercy on him) says that a man of Thaqif entrusted his authority to his wife, and she said: "You are divorced." He remained silent. The second time the woman said: "You are divorced." He said: "A stone in your mouth!" The third time the woman said: "You are divorced." The man said: "A stone in your mouth!" The dispute of the two was brought to Marwan bin al-Hakam (may Allah have mercy on him). The husband said: I gave her the authority for only one (divorce), and he swore an oath to that, so Marwan (may Allah have mercy on him) returned the wife to him. Al-Qasim (may Allah have mercy on him) used to like this judgement and considered it a good thing that he had heard.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 15049