Alma 37:39

And behold, there cannot any man work after the manner of so curious a workmanship. And behold, it was prepared to shew unto our fathers the course which they should travel in the wilderness;

No man can work in the way of such strange workmanship. It was prepared to show our fathers the path they should travel in the wilderness.

No one can make something so skillfully crafted. It was made to show our ancestors which way to travel in the wilderness.