Augustine of Hippo

"I go hence like a shadow that declines" [Psalm 109:22]. By this he signified death itself. For as night comes of the shadow's declining, so death comes of mortal flesh. "And am driven away as the locusts." This I think would be more suitably understood of His members, that is, of His faithful disciples. That he might make it much plainer, he preferred writing "locusts" in the plural number: although many may be understood where the singular number is used, as in that passage, "He spoke, and the locust came;" but it would have been more obscure. His disciples, then, were driven away, that is, were put to flight by persecutors, either the multitude of whom He wished to be signified by the word locusts, or their passing from one place to another.