It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that when Ghailan bin Salamah Thaqafi accepted Islam, he had ten wives in his marriage, and all of them also accepted Islam along with him. The Prophet (peace and blessings be upon him) said to him: "Select four of them (and divorce the remaining six)."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5558
Hadith Gradingحکم دارالسلام:حديث صحيح، رجاله ثقات إلا أن معمرا أخطأ فيه كما سلف بيانه بالرواية رقم: 4609، ويزيد بن هارون سمع من سعيد بن أبى عروبة قبل الاختلاط