'Ground' in the Bible

And the Lord said unto him, Loose the shoes from thy feet: for the place whereon thou standest is holy ground.

And I fell unto the ground, and heard a voice saying unto me, Saul, Saul, why persecutest thou me?

And fearing lest haply we should be cast ashore on rocky ground, they let go four anchors from the stern, and wished for the day.