Sayyiduna al-Harith bin Qays bin Amirah (may Allah be pleased with him) said: I accepted Islam while I had eight wives; they all accepted Islam with me and migrated with me. He (peace and blessings be upon him) said: "Choose four of them." So I would say to the one I wanted to keep: Come forward; and to the one I did not want to keep: Go back.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16014