Al-Dahhak bin Fayruz al-Daylami narrates from his father (Sayyiduna Fayruz al-Daylami (may Allah be pleased with him)) that he said: I said: "O Messenger of Allah (peace and blessings be upon him), I have accepted Islam, and I have two sisters as wives." He (peace and blessings be upon him) said: "Divorce whichever of the two you wish."
(b) In the hadith of Wahb bin Jarir: "Choose whichever of them you wish."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14058