The Vishnu Purana
Chapters
The Vishnu Purana: Book IV: Chapter XIII

On one occasion Satrájit, whilst walking along the sea shore, addressed his mind to Súrya, and hymned his praises; on which the divinity appeared and stood before him. Beholding him in an indistinct shape, Satrájit said to the sun, "I have beheld thee, lord, in the heavens as a globe of fire: now do thou shew favour unto me, that I may see thee in thy proper form." On this the sun taking the jewel called Syamantaka from off his neck, placed it apart, and Satrájit beheld him of a dwarfish stature, with a body like burnished copper, and with slightly reddish eyes. Having offered his adorations, the sun desired him to demand a boon, and he requested that the jewel might become his. The sun presented it to him, and then resumed his place in the sky. Having obtained the spotless gem of gems, Satrájit wore it on his neck, and becoming as brilliant thereby as the sun himself, irradiating all the region with his splendour, he returned to Dwáraká. The inhabitants of that city, beholding him approach, repaired to the eternal male, Purushottama, who, to sustain the burden of the earth, had assumed a mortal form (as Krishńa), and said to him, "Lord, assuredly the divine sun is coming to visit you." But Krishńa smiled, and said, "It is not the divine sun, but Satrájit, to whom Áditya has presented the Syamantaka gem, and he now wears it: go and behold him without apprehension." Accordingly they departed. Satrájit having gone to his house, there deposited the jewel, which yielded daily eight loads of gold, and through its marvellous virtue dispelled all fear of portents, wild beasts, fire, robbers, and famine.

Achyuta was of opinion that this wonderful gem should be in the possession of Ugrasena; but although he had the power of taking it from Satrájit, he did not deprive him of it, that he might not occasion ally disagreement amongst the family. Satrájit, on the other hand, fearing that Krishńa would ask him for the jewel, transferred it to his brother Prasena. Now it was the peculiar property of this jewel, that although it was an inexhaustible source of good to a virtuous person, yet when worn by a man of bad character it was the cause of his death. Prasena having taken the gem, and hung it round his neck, mounted his horse, and went to the woods to hunt. In the chase he was killed by a lion. The lion, taking the jewel in his mouth, was about to depart, when he was observed and killed by Jámbavat, the king of the bears, who carrying off the gem retired into his cave, and gave it to his son Sukumára to play with. When some time had elapsed, and Prasena did not appear, the Yádavas began to whisper one to another, and to say, "This is Krishńa's doing: desirous of the jewel, and not obtaining it, he has perpetrated the murder of Prasena in order to get it into his possession."