en_tn/1ch/21/21.md

with his face to the ground

This phrase describes that Ornan bowed far forward. To bow before someone is a way to show humility and respect. A deeper bow shows greater humility and respect. AT: "bowed very low to the ground" (See: rc://en/ta/man/translate/translate-symaction)

full price

"I will pay the full price for what this threshing floor is worth"