Historically, private treasury of the Muslim caliphs to cover their personal, family and executive expenditures.
Bai‘ al-muzayadah
Bai‘ habal al-habala
Badal al-khuluw
Bayt al-mal
Bay`
Bai‘ al-qimah
Bazari
Bai‘ al-kali bil kali
Bay` al-kali bi-kali
Bai‘ al-muqayadah