Numbers 23:17-19

¹⁷Returning he found him standing by his burnt sacrifice, and the princes of the Moabites with him. And Balac said to him: What hath the Lord spoken?

¹⁸But he taking up his parable, said: Stand, O Balac, and give ear: hear, thou son of Sephor:

¹⁹God is not a man, that he should lie, nor as the son of man, that he should be changed. Hath he said then, and will he not do? hath he spoken, and will he not fulfill?