Abu al-Bakhtari narrates that a man gave his wife one divorce, and then she had three menstrual periods. When she sat down to take her ritual bath, her husband came and took her back. She said: You have no such right. The two of them went to Sayyiduna Ibn Mas'ud (may Allah be pleased with him), and he made the woman swear by the One besides whom there is no god: had her husband taken her back at a time when the prayer had already become lawful for her? She did not take the oath, so he returned her to (her husband).
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9585