They say that Antipater, who had been left by Alexander as viceroy in Europe, was at variance with the king's mother Olympias. At first he did not take her seriously because Alexander did not heed her complaints against him, but later, as their enmity kept growing and the king showed an anxiety to gratify his mother in everything out of piety, Antipater gave many indications of his disaffection. This was bad enough, but the murder of Parmenion and Philotas struck terror into Antipater as into all of Alexander's Friends, so by the hand of his own son, who was the king's wine-pourer, he administered poison to the king. [2] After Alexander's death, Antipater held the supreme authority in Europe and then his son Casander took over the kingdom, so that many historians did not dare write about the drug. Casander, however, is plainly disclosed by his own actions as a bitter enemy to Alexander's policies. He murdered Olympias and threw out her body without burial, and with great enthusiasm restored Thebes, which had been destroyed by Alexander.
Edition :
Diodorus Siculus. Diodorus of Sicily in Twelve Volumes with an English Translation by C. H. Oldfather. Vol. 4-8. Cambridge, Mass.: Harvard University Press; London: William Heinemann, Ltd. 1989.
Remark :
perpetrator: Iolaus, son of Antipater was the cupbearer of Alexander III.
https://referenceworks.brillonline.com/entries/brill-s-new-pauly/iolaus-e526290#e526330
