Sahih Muslim
Sahih Muslim Book 009, Hadith Number 3476.
Hadith Section/Book: Sahih Muslim Sahih Muslim Book 09. Divorce
Chapter: It is forbidden to divorce the woman during her menses.
A hadith like this has been narrated on the authority of 'Ubaidullah, but he made no mention of the words of Ubaidullah that he said to Nafi'.