פירוש על משלי 30:31

The greyhound Heb. זרזיר מתנים. I do not know what it is, but from the context appears to be an animal with weak loins.

and the king against whom no one dares to rise up Heb. ומלך אלקום I do not know what it is according to its simple meaning, but the Aggadic midrashim interpret these five sections of four as corresponding to the four kingdoms. Since their rule over Israel was strengthened because of the iniquity of having transgressed the five Books of the Pentateuch, Scripture mentions them five times.

[16] The grave and the barren womb The grave represents the kingdom of Babylon, for it is stated regarding Nebuchadnezzar (Hab. 2:5): “who widened his desire like the nether- world.” And the barren womb, that is Media, in whose time mercy (רחמים) was held back from Israel, as it is said (Esther 3:13): to destroy, kill and cause to perish.”