1 Samuel 24:14
After whom is the king of Israel come out? after whom do you pursue? after a dead dog, after a flea.
Nave's Topical Index—AKJV

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 does hunt a partridge in the mountains.
Nave's Topical Index—AKJV