What is the ruling on greeting someone speaking on the phone with "peace be upon you" when their religion is unknown?
The ruling on greeting a disbeliever in messages is like the ruling on meeting them: if it is known that they are a disbeliever, one should not initiate the greeting. If it is not known, then there is no prohibition in doing so.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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