Musannaf Ibn Abi Shayba 9:1039

Waki’ narrated to us, from Sufyan, from Alqama bin Marthad, from Razin bin Sulayman, from Ibn Umar, who said: The Messenger of Allah (may Allah bless him and grant him peace) was asked about a man who divorced his wife three times, then she married another husband, and he closed the door and let down the curtain, then divorced her before he had entered into her. He said: "She is not lawful for him until she marries another husband and tastes his sweetness."