I said: Messenger of Allah, I have embraced Islam and two sisters are my wives. He said: Divorce any one of them you wish. (Using translation from Abū Dāʾūd 2243)
قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي أَسْلَمْتُ وَعِنْدِي أُخْتَانِ فَقَالَ رَسُولُ اللَّهِ ﷺ «طَلِّقْ أَيَّتَهُمَا شِئْتَ»