'Ground' in the Bible

The Lord said to him, 'Take your sandals off of your feet, for the place where you stand is holy ground.

Saul arose from the ground, and when his eyes were opened, he saw no one. They led him by the hand, and brought him into Damascus.

I fell to the ground, and heard a voice saying to me, 'Saul, Saul, why are you persecuting me?'

Fearing that we would run aground on rocky ground, they let go four anchors from the stern, and wished for daylight.