Albert Barnes Commentary Numbers 23:13

"And Balak said unto him, Come, I pray thee, with me unto another place, from whence thou mayest see them; thou shalt see but the utmost part of them, and shalt not see them all: and curse me them from thence." — Numbers 23:13 (ASV)

Balak seems to hope that the prophet’s words in (Numbers 23:10) reflected the impression conveyed by the scene before him at the moment of the augury; and therefore that the sight of a mere few straggling Israelites in the utmost part of the camp might induce a different estimate of their resources and prospects.