Historically, the country of those non-Muslims who had declared war against the Muslims.
Involuntary Public Borrowing
Al-bai‘ al-sahih
Credit Murabahah
DFR (Department of Fatwa and Research)
Bai‘ ‘ala al-wasf
Irq al-zalim
Muwakkil
Khiyar al-tarwiyah
Istisna'a
Khizanah al-mal