Al-Nu'man bin Abi Ayyash al-Ansari narrates from Ata' bin Yasar (may Allah have mercy on him) that a man came to Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) to ask about a man who had given his wife three divorces before having intercourse with her. Ata' (may Allah have mercy on him) says: I said: The divorce of a virgin is one. Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) said to me: You are only a storyteller. One divorce separates the wife, and three divorces make her unlawful until that woman marries another man.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 14967