'Ground' in the Bible

However, you may eat winged creatures that crawl on four legs that extend over its head and by which it hops on the ground.

"I am your God. I've separated you from the people. You are to differentiate between the clean animal and the unclean and between the unclean bird and the clean. You are not to make yourselves detestable on account of any animal, bird, or any creeping creature of the ground that I've separated for you as unclean.

I'll break your mighty pride. I'll make the heavens to be like iron and the ground like bronze.