'Floor' in the Bible

David therefore appealed to God for the child [to be healed]; and David fasted and went in and lay all night on the ground.

The elders of his household stood by him [in the night] to lift him up from the ground, but he was unwilling [to get up] and would not eat food with them.

Then David got up from the ground, washed, anointed himself [with olive oil], changed his clothes, and went into the house of the Lord and worshiped. Then he came [back] to his own house, and when he asked, they set food before him and he ate.

Then the king stood and tore his clothes and lay on the ground [in mourning]; and all his servants were standing by with their clothes torn.