'Ground' in the Bible

Then David came to Ornan, and Ornan looked and saw David. And he went out from the threshing floor, and they bowed down to David, faces to the ground.

but it happened [that] the word of Yahweh [came] over me, saying, 'You have shed much blood and have made much war; you shall not build a house for my name because you have shed much blood upon the ground before me.