Exodus 8:21

Exo 8:21 Else, if thou wilt not let my people go, behold, I will send swarms [of flies] upon thee, and upon thy servants, and upon thy people, and into thy houses: and the houses of the Egyptians shall be full of swarms [of flies], and also the ground whereon they [are].

Ver. 21. Shall be full of swarms of flies. ] Of all the ten plagues this was the most troublesome; for that they never suffered men to rest: so worldly cares; nocte ac die non dabunt requiem, as those tyrants in Jeremiah 16:1-21 .