What prediction does the priestess make to Acrisius?

According to Greek mythology, Acrisius was the son of Abas, king of Argos. Acrisius had a twin brother named Proteus that he exiled so he could seize the inheritance and take over the kingdom. Eventually Acrisius and Proteus went to war with each other and divided the kingdom.

Acrisius married King Lacedaemon's daughter Eurydice, and the couple had a daughter named Danae. Because he did not have a male heir to the throne, Acrisius went to consult the oracle at Delphi. The priestess at Delphi made a prediction that the son of Danae would kill him.

To prevent the prophecy from coming true, Acrisius locked Danae in a bronze tower so that she would remain a virgin and not have a child. However, the god Zeus entered the tower in the form of a golden shower and impregnated Danae. She gave birth to a son that she named Perseus.

Acrisius could not kill Perseus because he was the son of a god, so he put Danae and Perseus into a chest and threw it into the ocean. The chest made its way to the shore of the island of Seriphos, where Perseus was raised. After Perseus was fully grown, he took part in some games in the city of Larissa, where he accidentally killed his grandfather, Acrisius, with a discus, which fulfilled the prophecy.
https://www.greeklegendsandmyths.com/acrisius.html

https://www.greekmythology.com/Myths/Mortals/Acrisius/acrisius.html