What is a word for a restriction imposed by a person's religion? [closed]

Solution 1:

Both, the restriction and the restricted behavior or object, are called (a) taboo.

A social or religious custom prohibiting or restricting a particular practice or forbidding association with a particular person, place, or thing.

(Oxford English Dictionary)

Taboo is a generic term used to describe restrictions in different cultures and religions. It is not normally used by the adherents of these religions. Naturally, these "local" terms are specific to the religion (e.g. "tref", or "haram").

Solution 2:

It's just a

proscription

as was immediately mentioned in comments.

Couldn't be simpler.

This is the standard, common, term for precisely what you ask.

"What is a word for a restriction imposed by a person's religion?"

"proscription"