What horrible news did the king acrisius receive from the oracle of delphi?

King Acrisius of Argos received the troubling prophecy from the Oracle of Delphi that he would be killed by his grandson. To prevent this fate, he locked away his daughter, Danaë, but she eventually became pregnant by Zeus, giving birth to Perseus. This unforeseen turn of events ultimately set in motion the very prophecy Acrisius sought to avoid.