Numbers 22:13

להלך עמכם [THE LORD REFUSES TO GIVE ME LEAVE] TO GO WITH YOU, but only with princes greater than you. This tells us that he was of a proud nature and he did not wish to divulge that he was under the control of the Omnipresent except in arrogant terms (“God will not permit me to go with you”). Consequently (v. 15), ויוסף עוד בלק “Balak sent yet again [more princes, and more honorable than these] (Midrash Tanchuma, Balak 6).

And Bil῾am rose up in the morning, and said to the princes of Balaq, Go back to your land: for the Lord refuses to give me leave to go with you.

וַיָּ֤קׇם בִּלְעָם֙ בַּבֹּ֔קֶר וַיֹּ֙אמֶר֙ אֶל־שָׂרֵ֣י בָלָ֔ק לְכ֖וּ אֶֽל־אַרְצְכֶ֑ם כִּ֚י מֵאֵ֣ן יְהֹוָ֔ה לְתִתִּ֖י לַהֲלֹ֥ךְ עִמָּכֶֽם׃