bhagna-danto ’bhavat pura
yo ’sau daksaya kupitam
pusa—Pusa; anapatyah—without children; pista-adah—who lives by eating flour; bhagna-dantah—with broken teeth; abhavat—became; pura—formerly; yah—who; asau—that; daksaya—at Daksa; kupitam—very angry; jahasa—laughed; vivrta-dvijah—uncovering his teeth.
Pusa had no sons. When Lord Siva was angry at Daksa, Pusa had laughed at Lord Siva and shown his teeth. Therefore he lost his teeth and had to live by eating only ground flour.
Link to this page: https://prabhupadabooks.com/sb/6/6/43