Proverbs 30:15

(15) The horseleach hath two daughters, crying, Give, give.—The word “crying” is not in the Hebrew. The leech is here chosen as the emblem of insatiable greed; if it could speak, its “daughters,” i.e., the words it would utter, would be “Give, give.” So it forms an introduction to the quartette of “insatiable things” which follow.