Ghaylān ibn Salamah Ath-Thaqafi embraced Islam and he had ten wives from the pre-Islamic period of ignorance, and they all embraced Islam with him. The Prophet (may Allah's peace and blessings be upon him) commanded him to choose four of them. [Ibn Maajah]

"عن ابن عمر، أن غَيْلَانَ بن سَلَمَةَ الثقفي أَسْلَمَ وله عشر نِسْوَةٍ في الجاهلية، فَأَسْلَمْنَ معه، « فَأَمَرَهُ النبي -صلى الله عليه وسلم- أن يَتَخَيَّرَ أربعا مِنْهُنَّ». [صحيح.] - [رواه الترمذي وابن ماجه وأحمد.]"