Isaiah 18:1-5

Ah, the land of the rustling of wings, which is beyond the rivers of Ethiopia; that sendeth ambassadors by the sea, even in vessels of papyrus upon the waters, saying, Go, ye swift messengers, to a nation tall and smooth, to a people terrible from their beginning onward, a nation that meteth out and treadeth down, whose land the rivers divide! All ye inhabitants of the world, and ye dwellers on the earth, when an ensign is lifted up on the mountains, see ye; and when the trumpet is blown, hear ye. For thus hath Jehovah said unto me, I will be still, and I will behold in my dwelling-place, like clear heat in sunshine, like a cloud of dew in the heat of harvest. For before the harvest, when the blossom is over, and the flower becometh a ripening grape, he will cut off the sprigs with pruning-hooks, and the spreading branches will he take away and cut down.