Hadith.4423 - Al-Hasan ibn Mahbub narrated from Al-Ala ibn Razin, from Muhammad ibn Muslim, from Abu Ja'far Imam Muhammad ibn Ali Al-Baqir (as).
He said
I asked Imam (as) about a Muslim man marrying a Magian (Zoroastrian) woman.
Imam (as) replied: "No, but if he has a Magian bondwoman, then there is no harm in having relations with her while practicing withdrawal, and he should not seek to have a child with her."