Targum zu Divrej Hajamim I 1:20

And Yoqtan begat Elmodad, who measured and divided the world with ropes, and Shalef, who diverted [sh'laf] the rivers to their borders, and Ḥaṣarmavet, who set the place of the ambushes to slay those who pass by on the road, and Yeraḥ, who set up inns and anyone who came to eat and drink would be given poinson to kill them and take whatever they had.