Ibn ‘Umar told that Ghailan b. Salama ath-Thaqafi accepted Islam and that he had had ten wives in the pre-Islamic period who accepted Islam along with him; so the Prophet (ﷺ) told him to keep four and separate from the rest of them. Ahmad, Tirmidhi and Ibn Majah transmitted it.

وَعَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُ أَنَّ غيلَان بن سَلمَة الثَّقَفِيَّ أَسْلَمَ وَلَهُ عَشْرُ نِسْوَةٍ فِي الْجَاهِلِيَّةِ فَأَسْلَمْنَ مَعَهُ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَمْسِكْ أَرْبَعًا وَفَارِقْ سَائِرَهُنَّ» . رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيّ وَابْن مَاجَه