Magas, who was married to Apame, daughter of Antiochus, son of Seleucus, persuaded Antiochus to break the treaty which his father Seleucus had made with Ptolemy and to attack Egypt
. When Antiochus resolved to attack, Ptolemy dispatched forces against all the subjects of Antiochus, freebooters to overrun the lands of the weaker, and an army to hold back the stronger, so that Antiochus never had an opportunity of attacking Egypt
. I have already stated how this Ptolemy sent a fleet to help the Athenians against Antigonus and the Macedonians, but it did very little to save Athens
. His children were by Arsinoe
, not his sister, but the daughter of Lysimachus. His sister who had wedded him happened to die before this, leaving no issue, and there is in Egypt
a district called Arsinoites after her.