A.T. Robertson Commentary Revelation 6:15

"And the kings of the earth, and the princes, and the chief captains, and the rich, and the strong, and every bondman and freeman, hid themselves in the caves and in the rocks of the mountains;" — Revelation 6:15 (ASV)

The princes (ο μεγιστανες). Late word from the superlative μεγιστος, in LXX, Josephus, papyri, in N.T. only in Mr 6:21; Revelation 6:15; 18:23, for the grandees, the persecuting proconsuls (Swete).

The chief captains (ο χιλιαρχο). The commanders of thousands, the military tribunes (19:18).

The rich (ο πλουσιο). Not merely those in civil and military authority will be terrorstricken, but the self-satisfied and complacent rich (James 5:4f.).

The strong (ο ισχυρο). Who usually scoff at fear. See the list in 13:16; 19:18. Cf. Luke 21:26.

Every bondman (πας δουλος)

and freeman (κα ελευθερος). The two extremes of society.

Hid themselves in the caves and in the rocks of the mountains (εκρυψαν εαυτους εις τα σπηλαια κα εις τας πετρας των ορεων). Based on Isa 2:10,18f. First aorist active indicative of κρυπτω with the reflexive pronoun. For the old word σπηλαιον see Mt 21:13; Hebrews 11:38. Ορεων is the uncontracted Ionic form (for ορων) of the genitive plural of ορος (mountain).