According to rabbinic literature, the Sambation is the river beyond which the Ten Lost Tribes of Israel were exiled by the Assyrian king Shalmaneser V. In the earliest references, such as the Targum Pseudo-Jonathan, the river is given no particular attributes, but later literature claims it rages with rapids and throws up stones six days a week, or even consists entirely of stone, sand and flame. For those six days the Sambation is impossible to cross, but it stops flowing every Shabbat, the day Jews are not allowed to travel; some writers say this is the origin of the name ...