And to them it was given that they should not kill them, but that they should be tormented five months: and their torment was as the torment of a scorpion, when he striketh a man.
They ... they. The first "they" is the locusts; the second, the unsealed.
Five months - the ordinary time during which locusts continue their ravages (Elliott); 150 prophetic days,
i.e., years, from 612 AD, when Mohammed opened his mission, to 762 AD, when the Caliphate was moved to Bagdad. Their torment - the torment of the sufferers. This and Revelation 9:6 cannot refer to an invading army; for it would kill, not merely torment.