Its biblical. Cain the farmer slays Abel the shepherd in Genesis.
pre biblical, read the epic of Gilgamesh where Gilgamech enlists the harlot Shamat
to ensnare the wild man Enkidu who otherwise may have been to fierce to fight,the very fact of Neanderthal and denisovian blood in our own suggests, if not that, then something that rhymes.
Also present in Sumerian tablets: The Debate between Sheep and Grain[1] circa 2000BC.