Isaiah 33:16

He shall dwell on high: his place of defence [shall be] the munitions of rocks: bread shall be given him; his waters [shall be] sure.

Ver. 16. He shall dwell on high.] Extra iactum, out of the gunshot, the reach of evils and enemies. Or in heaven shall he dwell with God in safety who is to the wicked a consuming fire. Isa 33:14

His place of defence shall be the munitions of rocks.] Rocks within rocks; rocks beneath, above rocks; rocks so deep no pioneer can undermine them, so thick no cannon can pierce them, so high no ladder can scale them, &c.

Bread shall be given him; his waters shall not fail.] He shall have all that his heart can wish, or need require.