According to hadith collections, in 631 an Arab Christian envoy from Najran (currently in northern Yemen and partly in Saudi Arabia) came to Muhammad to argue which of the two parties erred in its doctrine concerning Jesus. After likening Jesus' miraculous birth to Adam's creation, Muhammad called them to mubahala (cursing), where each party should ask God to destroy the lying party and their families.
In 631, an Arab Christian envoy from Najran came to Muhammad to argue about Jesus' teachings. After comparing Jesus' miraculous birth to Adam's creation, Muhammad challenged them to a curse-based debate (mubahala), where each party would ask God to destroy the other and their families if they were wrong.