It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) chose Sayyidah Juwayriyah (may Allah be pleased with her) for himself from among the captives.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20528