they: Luke 8:28; Job 1:11, Job 2:5; Philippians 2:10-11
the deep: "The abyss," says Dr. Doddridge, "the prison in which many of these fallen spirits are detained; and to which some, who may, like these, have been permitted for a while to range at large, are sometimes by Divine justice and power remanded." Matthew 25:41; Revelation 9:2, Revelation 19:20, Revelation 20:2-3, Revelation 20:14-15