It is narrated from Sayyidah Umm Kulthum bint Uqbah (may Allah be pleased with her) that she was married to Sayyiduna al-Zubayr (may Allah be pleased with him). She came to him while he was performing ablution and said: I would like you to set my mind at ease with one divorce. So he divorced her while she was pregnant. He went to the mosque, and when he came back she had already delivered what was in her womb. So he came to the Prophet (peace and blessings be upon him) and mentioned what had happened. The Prophet (peace and blessings be upon him) said: "The prescribed term has reached its end (that is, her waiting period has ended); so propose marriage to her for herself." He said: She deceived me; may Allah deceive her.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب العدد / 15420