Salim bin Abdullah (may Allah be pleased with them both) narrates from his father that there was a man called Ghaylan bin Salamah al-Thaqafi (may Allah be pleased with him). When he accepted Islam, he had ten wives, and they also accepted Islam. So he (peace and blessings be upon him) said: "Choose four of them."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14042