Musannaf Ibn Abi Shayba 13:2851

Abu Bakr narrated to us, he said: Ibn ‘Ulayyah narrated to us, from Yunus, from Humayd ibn Hilal, he said: ‘Iqal—or Hakim ibn ‘Iqal—said: Uthman ibn ‘Affan wrote to ‘Iqal to purchase one hundred households and bring them to Medina, and not to purchase anything that would separate a person from his father.