'Ground' in the Bible

They told the king, saying, “Here is Nathan the prophet.” And when he came in before the king, he prostrated himself before the king with his face to the ground.

Then Bathsheba bowed with her face to the ground, and prostrated herself before the king and said, “May my lord King David live forever.”

Solomon said, “If he is a worthy man, not one of his hairs will fall to the ground; but if wickedness is found in him, he will die.”

In the plain of the Jordan the king cast them, in the clay ground between Succoth and Zarethan.