The horseleach hath two daughters, crying, Give, give. There are three things that are never satisfied, yea, four things say not, It is enough: The grave; and the barren womb; the earth that is not filled with water; and the fire that saith not, It is enough.
The greed of the oppressors in the preceding verse leads on to other examples of desires that are never satisfied. Agur started with the example of the leech, which has an endless capacity for sucking blood. The other examples are the grave, which always has room and never is full, the barren womb is never willing to accept its sterility but hopes continually for motherhood, the earth is not satisfied with water because no matter how much rain falls, it can always absorb more, and fire which never says enough, as it can devour as much fuel as it is fed. The expression “there are three things that are never satisfied, yea four things…” is a literary formula used to produce a sense of climax.