The Ground where Dead are Buried.

"This is the fate of those who trust in themselves, and of their followers, who approve their sayings. Like sheep they are destined for the grave, and death will feed on them…their forms will decay in the grave…. But God will redeem my life from the grave; He will surely take me to Himself." (Psalm 49:13-15).

"Do not be amazed at this, for a time is coming when all who are in their graves will hear his voice and come out-those who have done good will rise to live, and those who have done evil will rise to be condemned." (John 5:28-29).

In Bible times some would have a tomb in the rock, perhaps a converted small cave.

"Early on the first day of the week…Mary Magdalene went to the tomb and saw that the stone had been removed from the entrance. So she came running to Simon Peter and the other disciple, the one Jesus loved, and said, "They have taken the Lord out of the tomb, and we don't know where they have put him!" So Peter and the other disciple started for the tomb…. Then Simon Peter…arrived and went into the tomb." (John 20:1-6).