Balaam’s native soil was ordinarily irrigated by water fetched from the neighboring Euphrates, and carried in buckets suspended from the two ends of a pole. Thus the metaphor would import that Israel should have his own exuberant and unfailing channels of blessing and plenty. Some take the word to be predictive of the future benefits which, through the means of Israel, were to accrue to the rest of the world.
Agag - The name, apparently hereditary (compare 1 Samuel 15) to the chieftains of Amalek, means “high.” The words point to the Amalekite kingdom as highly prosperous and powerful at the time (compare Numbers 24:20); but also to be far excelled by the future glories of Israel. The Amalekites never in fact recovered their crushing defeat by Saul (1 Samuel 15:2 ff), though they appear again as foes to Israel in the reign of David (1 Samuel 27:1-12 and 30). The remnant of them was destroyed in the reign of Hezekiah 1 Chronicles 4:43.