Rise up: this word implies, either,
1. The reverence wherewith he should hear and receive God's message, as Eglon did, Judges 3:20, which might have been probable, if Balak had been now sitting, as Ehud there was; but he was standing, Numbers 23:15: or rather,
2. The diligent attention required; Rouse up thyself, and carefully mind what I say.