Matsyapurana 45.8

45.8

hatvā ṛkṣaḥ prasenaṃ tu tatastaṃ maṇimādadāt
adṛṣṭastu hatastena antarbilagatastadā //

Once upon a time, Prasena wearing his Syamantaka gem went out for a hunt, when hearing the voices of some wild beasts in a cave he entered it and found a bear inside, and they looked at each other. He fought with the animal, but was killed by the latter. After that, the bear took the matchless jewel from the person of the dead king and retired into the deeper cavities of the cave. In the meantime the news of Prasena's death became public.—6-8.