سُنَنُ ابْنِ مَاجَهْ
Sunan Ibn Majah 1952
The Chapters on Marriage
A man became Muslim and he has more than four wives
حَدَّثَنَا أَحْمَدُ بْنُ إِبْرَاهِيمَ الدَّوْرَقِيُّ، حَدَّثَنَا هُشَيْمٌ، عَنِ ابْنِ أَبِي لَيْلَى، عَنْ حُمَيْضَةَ بِنْتِ الشَّمَرْدَلِ، عَنْ قَيْسِ بْنِ الْحَارِثِ، قَالَ أَسْلَمْتُ وَعِنْدِي ثَمَانِ نِسْوَةٍ فَأَتَيْتُ النَّبِيَّ ـ صلى الله عليه وسلم ـ فَقُلْتُ ذَلِكَ لَهُ فَقَالَ اخْتَرْ مِنْهُنَّ أَرْبَعًا .
It was narrated that Qais bin Harith said: “I became Muslim and I had eight wives. I went to the Prophet (ﷺ) and told him about that. He said: 'Choose four of them.' ”
Sunan Ibn Majah, 1952Da'if (Darussalam)