In 530 [BCE] their [the Persians'] great king Cyrus died in an aggressive war against a tribal army out east in central Asia beyond the river Oxus. The Greek historian Herodotus claimed to know at least seven Persian versions of Cyrus' death, but the one which he chose to tell had none of the others' solemnity. Cyrus' opponent, he wrote, the tribal queen Tomyris, had taunted him for being "insatiable for blood." When he attacked her army and was killed, she proved her point by filling a bag with blood, hunting for King Cyrus' corpse and stuffing its head into the bag to give it more of the blood it had craved.
--Robin Lane Fox (1946- ), British historian, in The Classical World: An Epic History from Homer to Hadrian (publ. 2006)