Revelation 17:10, 12, 16-17
Revelation 17:10 NIV
They are also seven kings. Five have fallen, one is, the other has not yet come; but when he does come, he must remain for only a little while.
Revelation 17:12 NIV
“The ten horns you saw are ten kings who have not yet received a kingdom, but who for one hour will receive authority as kings along with the beast.