Verses with the word flea in the Old Testament (2 verses):

1 Samuel 24:14
After whom is the king of Israel come out? after whom dost thou pursue? after a dead dog, after a flea.

1 Samuel 26:20
Now therefore, let not my blood fall to the earth before the face of the LORD: for the king of Israel is come out to seek a flea, as when one doth hunt a partridge in the mountains.