CHAPTER: Regarding A Man Who Was Married To More Than Four Women, Or To Two Sisters, And Then He Accepts Islam.
Narrated Al-Harith ibn Qays al-Asadi: I embraced Islam while I had eight wives. So I mentioned it to the Prophet صلی اللہ علیہ وسلم. The Prophet (said) said: Select four of them. Abu Dawud said: This tradition has also been narrated to us by Ahmad bin Ibrahim from Hushaim. He said: Qais bin al-Harith instead of al-Harith bin Qais. Ahmad bin Ibrahim said: This is correct, i. e. Qais bin al-Harith.
The tradition mentioned above has also been transmitted by Qais bin Al Harith through a different chain of narrators to the same effect.
Al-Dahhak bin Firuz reported on the authority of his father: I said: Messenger of Allah, I have embraced Islam and two sisters are my wives. He said: Divorce any one of them you wish.