Athenaeus
Proteas of Macedon*, also, drank a very great deal, as Ephippus says in his work On the Funeral of Alexander and Hephaestion, and enjoyed a sturdy physique throughout his life, although he was completely devoted to the practice of drinking. Alexander, for example, once called for a six-quart cup and after a drink proposed the health of Proteas. He took the cup, and when he had sung the king's praises he drank, to the applause of everybody. A little while afterwards Proteas demanded the same cup, and again drinking, pledged the king. Alexander took it and pulled at it bravely, but could not hollowed out; on the contrary, he sank back on his cushion and let the cup drop from his hands. As a result, he fell ill and died, because, as Ephippus says Dionysus was angry at him for besieging his native city, Thebes. Alexander also drank a very great deal, so that after the spree he would sleep continuously for two days and two nights. This is revealed in his Journals, written by Eumenes of Cardia and Diodotus of Erythrae.
* The son of Lanike and Alexander’s foster brother