«إِنْ شَتَمْتُكَ فِي الْمَسْجِدِ»
“If I insult you in the mosque.”
Here the phrase modifies insulting, an act that can take place at a location. The place can therefore meaningfully restrict the act, unlike a bare attempt to locate the legal existence of a divorce.
Two locations may need to be distinguished: that of the actor and that of the recipient or effect. The character of the named act determines which location is relevant to the truth of the condition.