Exodus 10:7 (KJV)

And they shall cover the face of the earth, that one cannot be able to see the earth: and they shall eat the residue of that which is escaped, which remaineth unto you from the hail, and shall eat every tree which groweth for you out of the field:

And they shall fill thy houses, and the houses of all thy servants, and the houses of all the Egyptians; which neither thy fathers, nor thy fathers’ fathers have seen, since the day that they were upon the earth unto this day. And he turned himself, and went out from Pharaoh.

And Pharaoh’s servants said unto him, How long shall this man be a snare unto us? let the men go, that they may serve the Lord their God: knowest thou not yet that Egypt is destroyed?

And Moses and Aaron were brought again unto Pharaoh: and he said unto them, Go, serve the Lord your God: but who are they that shall go?

And Moses said, We will go with our young and with our old, with our sons and with our daughters, with our flocks and with our herds will we go; for we must hold a feast unto the Lord.