Mughirah (may Allah have mercy on him) narrates from the descendants of al-Harith bin Qays bin Amirah al-Asadi (may Allah be pleased with him) that al-Harith (may Allah be pleased with him) accepted Islam while he had eight wives. He mentioned this before the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Choose four of them."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14053