'Beds' in the Bible

Tremble [with anger or fear], and do not sin;Meditate in your heart upon your bed and be still [reflect on your sin and repent of your rebellion]. Selah.

Then the stream beds of the waters appeared,And the foundations of the world were laid bareAt Your rebuke, O Lord,At the blast of the breath of Your nostrils.

Let the godly ones exult in glory;Let them sing for joy on their beds.