"You will bring to the shrine of Ani tomorrow one she-goat, one hen... and a hundred cowries"
Public DomainCowries

Cowries are mollusk shells and are used by many nations as a form of currency. It's easy to see why; they're small, easily recognizable, and difficult to conterfeit. Their use dates back to the early Chinese emperors. They were also a common currency in Nigeria. Their use delined after colonization since European settlers replaced the cowry with their own money.