It is reported from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "There is no right of pre-emption for a Christian."
Abu Ahmad (Ibn Adi) said: The hadiths of Na'il are very obscure (unreliable), especially when he narrates from al-Thawri.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشفعة / 11592