Genesis 36:37

And Samlah died
As is supposed, about A. M. 2283. and Saul of Rehoboth [by] the river reigned in his stead;
Rehoboth was one of the cities built by Ashur, ( Genesis 10:11 ) ; and was situated near the river Euphrates; and so the Targum of Jonathan calls it Rehoboth which is by Euphrates; but Jerom ^F14, from Eusebius, takes it to be another city by a river in Edom, and says, that there was in his days a garrison in the country of Gabalena (a part of Idumea), a large village called by that name.