Charles Ellicott Commentary Numbers 23:14

"And he took him into the field of Zophim, to the top of Pisgah, and built seven altars, and offered up a bullock and a ram on every altar." — Numbers 23:14 (ASV)

The field of Zophim.— that is, of watchers. The spot seems to be identified with that from which Moses afterwards surveyed the promised land (Deuteronomy 3:27), and which is described in Deuteronomy 34:1 as “the mountain of Nebo,” or Mount Nebo. It is possible, however, that Pisgah may have had more than one of such summits.