When they had left their gods there - The practice of carrying images of the gods to battle was common among the nations of antiquity, and arose from the belief that there was virtue in the images themselves, and that military success would be obtained by means of them.
Related Commentaries of 1 Chronicles 14:12
1 Chronicles 14:12
12 And when they had left their gods there, David gave a commandment, and they were burned with fire.