וַיִּשָּׂ֨א בִלְעָ֜ם אֶת־עֵינָ֗יו וַיַּרְא֙ אֶת־יִשְׂרָאֵ֔ל שֹׁכֵ֖ן לִשְׁבָטָ֑יו וַתְּהִ֥י עָלָ֖יו ר֥וּחַ אֱלֹהִֽים׃
And Balaam lifted up his eyes, and he saw Israel dwelling tribe by tribe; and the spirit of God came upon him.
Read kabbalistic (mystical) interpretation of Numbers 24:2: and classical mystical sources.