Ptolemy III Euergetes
In 246 BC, when Ptolemy died, Antiochus II took up again with his first wife, Laodice. Antiochus died shortly thereafter, many suspect from poisoning. Queen Berenice claimed the regency for her infant son Antiochus however, she and her son were both killed by Laodice. Berenice's brother, Ptolemy III Euergetes, succeeded their father and set about to avenge his sister's murder by invading Syria and having Laodice killed. This is also mentioned in the Book of Daniel .