Numbers 23:1

XXIII.

(1) Build me here seven altars. — The patriarchs of old, as their pious descendants after the giving of the Law, never erected more than one altar in one place. A plurality of altars was the badge of idolatry. Hengsten-berg adduces several instances in proof that the ancients were accustomed to have recourse to sacrifice and conjuration in order to avert calamity and produce prosperity. (History of Balaam and his Prophecies, p. 392.) The number seven was regarded as significant among the Greeks and Romans, as well as among the Israelites.