Charles Ellicott Commentary Numbers 14:43

"For there the Amalekite and the Canaanite are before you, and ye shall fall by the sword: because ye are turned back from following Jehovah, therefore Jehovah will not be with you." — Numbers 14:43 (ASV)

Are there before you.— Or, will be there before you. If the same persons are spoken of here as in Numbers 14:25, it will follow that they had left their temporary dwelling and gone up into the hill country. It is possible, however, that the reference is to different portions of the same nations.