A lawful ruling may be surrounded by factors that render it forbidden, such as marriage to a woman of the Book or marriage to more than one woman.
Machine translationRead the Arabic original
The Shaykh : The Christian wife... the offspring resulting from his marriage to her [receive] an Islamic upbringing, even though this is like that; both are lawful by the explicit text of the Noble Qur'an. However, a lawful ruling in the Shari'ah may be affected by or surrounded by factors that make it prohibited, and the opposite is exactly the same.
Source
www.al-albany.com
The Arabic text is copied verbatim from the original source, without any edits.