'Dens' in the Bible

The nursing child will play over the hole of the cobra, and the weaned child will put his hand on vipers' dens.

Hyenas will howl in its strongholds, and jackals will make their dens in its citadels. Its time is close at hand, and its days will not be extended any further.

Because the palaces shall be forsaken; the multitude of the city shall be left; the forts and towers shall be for dens for ever, a joy of wild asses, a pasture of flocks;