Isaiah 21:7
And he saw a chariot with a couple of horsemen, a chariot of asses, and a chariot of camels; and he hearkened diligently with much heed: And he saw a chariot with a couple of horsemen, a chariot of asses, and a chariot of camels; and he hearkened diligently with much heed:
The figure is a watchman who listens with diligence and great heed, maintaining a careful and attentive watch. His posture is one of sustained, concentrated observation, straining to discern what is coming. This watchfulness portrays faithful watchmen stationed on the battlements of the church. In times of unrest their voices are raised in warning and earnest pleading.