The adhan of one mosque does not suffice for another adjoining mosque

Question

The question is this: two mosques directly adjoin each other, one small and one large, and separate congregations are held in each. Is the adhan of one mosque not sufficient?

Answer

When the two mosques are independent and a separate congregation is held in each, then in each mosque the adhan for the congregation should also be called independently.

Source: Fatawa Mahmudiyya

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