per-awth'
from an unused root meaning to break forth; rushing; Perath
(i.e. Euphrates), a river of the East:--Euphrates.
David [01732] smote [05221] also Hadadezer [01909], the son [01121] of Rehob [07340], king [04428] of Zobah [06678], as he went [03212] to recover [07725] his border [03027] at the river [05104] Euphrates [06578].Hadadezer: or, Hadarezer