Deuteronomy 18:21-22

If what a prophet proclaims in the name of the Lord does not take place or come true, that is a message the Lord has not spoken. That prophet has spoken presumptuously, so do not be alarmed.

Doña Juana la Loca (Queen Joanna the Mad), 1877,
oil on canvas painting by Spanish painter Francisco Pradilla.

Joanna of Castile is shown watching over the casket of her dead husband, Philip I of Castile. Philip died suddenly of typhoid fever, and it was said she carried his casket around with her everywhere, believing one day he would wake from sleep. This was a common ritual for her.