Cerbera odollam

Until the 19th century, Cerbera seeds were used in Madagascar during the ordeals.

An excerpt from the article 15 facts about Cerbera odollam
Ordeals were used in medieval trials, mainly criminal, but also in civil ones. They were used to clear of or confirm charges against a defendant. Ordeals were based on the assumption that God would not allow an innocent person to die. Those who survived the ordealswere acquitted of all charges.