Appian of Alexandria Civil Wars 5.1.9

[9] Straightway Antony’s interest in public affairs began to dwindle. Whatever Cleopatra ordered was done, regardless of laws, human or divine. While her sister Arsinoe was a suppliant in the temple of Artemis Leucophryne at Miletus, ¹ Antony sent assassins thither and put her to death. Serapion, Cleopatra’s prefect in Cyprus, who had assisted Cassius and was now a suppliant at Tyre, Antony ordered the Tyrians to deliver to her. He commanded the Aradians to deliver up another suppliant who, when Ptolemy, the brother of Cleopatra, disappeared at the battle with Caesar on the Nile, said that he was Ptolemy, and whom the Aradians now held. He ordered the priest of Artemis at Ephesus, whom they called Megabyzus, ² and who had once received Arsinoe as queen, to be brought before him, but in response to the supplications of the Ephesians, addressed to Cleopatra herself, released him. So swiftly was Antony transformed, and this passion was the beginning and the end of evils that befell him. When Cleopatra returned home Antony sent a cavalry force to Palmyra, situated not far from the Euphrates, to plunder it, bringing the trifling accusations against its inhabitants, that, being on the frontier between the Romans and the Parthians, they had avoided taking sides between them; for, being merchants, they bring the products of India and Arabia and dispose of them in the Roman territory. In fact, Antony’s intention was to enrich his horsemen, but the Palmyreans were forewarned and they transported their property across the river, and, stationing themselves on the bank, prepared to shoot anybody who should attack them, for they were expert bowmen. The cavalry found nothing in the city. They turned around and came back, having met no foe, and empty-handed.