Numbers 23:19

That he should lie, i.e. break his faith and promises made to his people for their preservation and benediction. That he should repent,. e. change his counsels or purposes; which men do, either because they are not able to execute them, or because they are better informed and their minds changed by some unexpected occurrent, or by their lusts and passions, none of which have place in God. And therefore I plainly see that all our endeavours and repeated sacrifices are to no purpose, and can make no impression in God, nor induce him to curse those whom he hath purposed, and solemnly and frequently promised, to bless. Shall he not do it? Is he like a man that oft speaks and promises what he either never intends, or cannot or will not perform?