Musannaf Ibn Abi Shayba 9:1441

Abu Bakr narrated to us, he said: Muhammad ibn Fudayl narrated to us, from Yazid ibn Abi Ziyad, from Zayd ibn Wahb, who said: Umar wrote to us that a Bedouin should not marry a female emigrant (Muhajirah) until he takes her out from the abode of emigration (Dar al-Hijrah).