After whom is the king of Israel come out? after whom do you pursue? after a dead dog, after a flea.
after a flea? a little contemptible animal, not easily caught, as it is observed by some, and when caught good for nothing. David, by this simile, fitly represents not only his weakness and impotence, his being worthless, and of no account, and beneath the notice of such a prince as Saul; but the circumstances he was in, being obliged to move from place to place, as a flea leaps from one place to another, and is not easily taken, and when it is, of no worth and value; signifying, that as it was not worth his pains to seek after him, so it would be to no purpose, he should not be able to take him.