A man who divorces his wife and she menstruates once or twice

Ibrahim (may Allah have mercy on him) said: If a man gives his wife one divorce and she has one or two menstrual periods, then she marries someone during her waiting period and her waiting period is completed while with the second husband, she becomes irrevocably separated (ba'in) from the first husband by one divorce.

Abd al-A'la (may Allah have mercy on him) said: Sa'id was asked: If a man marries a woman during her waiting period, then later learns that he married her during her waiting period, and her waiting period has been completed while with him, does her first husband have the right to take her back? After stating the chain, he said that Sa'id bin Jubayr (may Allah have mercy on him) said: "The two of them are to be separated, and the husband has no right to take her back, because her waiting period was completed while she was with this man."

Qatadah said: Her husband has the greater right to her, and he may not approach her until her waiting period is completed.

Ibrahim (may Allah have mercy on him) said: A man gave his wife one or two divorces, and she had two menstrual periods while with him; then another man married her and she had two menstrual periods while with him. She has become irrevocably separated (ba'in) from the first husband, and she does not count it toward the one after him.

Al-Zuhri (may Allah have mercy on him) said: She does count it toward the one after him.