The word ubal denotes a watercourse, river, or stream. It appears in Daniel 8 describing the Ulai Canal near Susa, where Daniel received his vision of the ram and the goat. The term likely derives from a root meaning to carry or flow.
Daniel's vision beside the ubal (the Ulai river) places prophetic revelation within a specific geographical context, grounding heavenly visions in earthly reality. Throughout Scripture, rivers and watercourses serve as sacred boundaries and thresholds of divine encounter — from the Jordan to the Euphrates. The flowing water symbolizes God's sustaining presence and the movement of His purposes in history.