Isaiah 21:8

Then he cried, "A lion, my Lord! I stand continually on the watchtower in the daytime; I have sat at my post every night.

Surrounding context

21:7 And he saw a chariot with a pair of horsemen, A chariot of donkeys, and a chariot of camels, And he listened earnestly with great care.

21:8 Then he cried, "A lion, my Lord! I stand continually on the watchtower in the daytime; I have sat at my post every night.

21:9 And look, here comes a chariot of men with a pair of horsemen!" Then he answered and said, "Babylon is fallen, is fallen! And all the carved images of her gods He has broken to the ground."

Translation and sources