[3] Philip, the eldest of his sons, shortly after coming to the throne was seized by a wasting disease which proved fatal. Antipater, the next son, murdered his mother Thessalonice, the daughter of Philip, son of Amyntas, and of Nicasipolis, charging her with being too fond of Alexander, who was the youngest of Cassander's sons. Getting the support of Demetrius, the son of Antigonus, he deposed with his help and punished his brother Antipater. However, it appeared that in Demetrius he found a murderer and not an ally.
Edition :
Pausanias. Pausaniae Graeciae Descriptio, 3 vols. Leipzig, Teubner. 1903.
Remark :
date: The Date is taken from the New Pauly: https://referenceworks.brillonline.com/entries/brill-s-new-pauly/thessalonica-e1210990# long-term consequence: "294 [...][Antipater] murdered his mother and exiled the brother, who sought help from Pyrrhus and also Demetrius. Pyrrhus assisted Alexander against the ceding of territory designed to bring about a settlement with A. Demetrius arrived somewhat later, met with Alexander in Dion and had him murdered." https://referenceworks.brillonline.com/entries/brill-s-new-pauly/antipater-e124860#e124870
