Habib bin Abi Thabit حبيب بن أبي ثابت قيس · The Chapters on Marriage

a woman came to the Prophet and became Muslim, and a man married her. Then her first husband came and said: "O Messenger of Allah, I became Muslim with her, and she knew that I was Muslim." So the Messenger of Allah took her away from her second husband and returned her to her first husband.