"Ghilan bin Salamah Ath-Thaqafi accepted Islam and he had ten wives in Jahiliyyah who accepted Islam along with him. So the Prophet ordered (him) to chose four (of them)."  

أَنَّ غَيْلاَنَ بْنَ سَلَمَةَ الثَّقَفِيَّ أَسْلَمَ وَلَهُ عَشْرُ نِسْوَةٍ فِي الْجَاهِلِيَّةِ فَأَسْلَمْنَ مَعَهُ فَأَمَرَهُ النَّبِيُّ ﷺ أَنْ يَتَخَيَّرَ أَرْبَعًا مِنْهُنَّ