Revelation 16:12

16:12 Then the sixth angel poured out his bowl on the great river Euphrates and dried up its water to prepare the way for the kings from the east.

Revelation 14:15

14:15 Then another angel came out of the temple, shouting in a loud voice to the one seated on the cloud, “Use your sickle and start to reap, because the time to reap has come, since the earth’s harvest is ripe!”