the womb: the organ in a woman's body where a child is conceived and carried until birth
Wherever this word appears in the Hebrew Bible it means the physical womb, and its most striking feature is who acts on it. Again and again God is the one who opens it, closes it, forms a child inside it, or calls a person out of it. No other body part in the Hebrew Scriptures is so consistently the place where God works directly on a human life.
The same organ shows up in several settings. It is the seat of fertility, which God alone gives or withholds. It is the reference point of the law of the firstborn, described as the child who first opens the womb. It is the place where a person's life begins and is shaped, named in the recurring phrase "from the womb." And in poetry it can even become an image for the origin of the world, as when the sea is pictured bursting out of a womb.
One further connection gives this word much of its weight. Hebrew's main word for compassion or mercy comes from the same root as "womb." The link is real, and a few poems play on it deliberately, but the two are separate words, and the mercy word had come to mean compassion in general rather than womb-feeling in particular. So the womb stands quietly behind the language of mercy without every use of mercy meaning "womb."
Nuances
The Hebrew of this verse is textually uncertain, and how (or whether) "womb" figures in it is disputed.
- contestedKeep the traditional Hebrew text, reading a poetic "womb of the dawn" from which the king or his people come.; Masoretic Text (BHS)
- contestedEmend toward the ancient Greek, giving "from the womb, before the dawn I have begotten you," a royal birth image.; Frank-Lothar Hossfeld and Erich Zenger, Psalms 3, Hermeneia (Fortress, 2011), 138-150; Hans-Joachim Kraus, Psalms 60-150, Continental Commentary (Fortress, 1993), 345-351