Kathasaritsagara 2.2.50

And that Daitya maiden gave him a ring that destroyed the effect of poison. Then that young man remaining there fell in love with her. And she cunningly said to him, "Bathe in this tank, and when you dive in, take with you this sword to keep off the danger of crocodiles." He consented, and diving into the tank, rose upon that very bank of the Ganges from which he first plunged in. Then he, seeing the ring and the sword, felt astonishment at having emerged from the lower regions, and despondency at having been tricked by the Asura maid. Then he went towards his own house to look for his friends, and as he was going he saw on the way his friend Nishthuraka. Nishthuraka came up to him and saluted him, and quickly took him aside into a lonely place, and when asked by him for news of his relations, gave him this answer; "On that occasion when you plunged into the Ganges we searched for you many days, and out of grief we were preparing to cut off our heads, but a voice from heaven forbade that attempt of ours saying, 'My sons, do no rash act, your friend shall return alive.' And then we were returning into the presence of your father, when on the way a man hurriedly advanced to meet us and said this 'You must not enter this city at present, for the king of it Vallabhaśakti is dead, and the ministers have with one accord conferred the royal dignity on Vikramasakti;

And that Daitya maiden gave him a ring that destroyed the effect of poison. Then that young man remaining there fell in love with her. And she cunningly said to him, "Bathe in this tank, and when you dive in, take with you this sword to keep off the danger of crocodiles." He consented, and diving into the tank, rose upon that very bank of the Ganges from which he first plunged in. Then he, seeing the ring and the sword, felt astonishment at having emerged from the lower regions, and despondency at having been tricked by the Asura maid. Then he went towards his own house to look for his friends, and as he was going he saw on the way his friend Nishthuraka. Nishthuraka came up to him and saluted him, and quickly took him aside into a lonely place, and when asked by him for news of his relations, gave him this answer; "On that occasion when you plunged into the Ganges we searched for you many days, and out of grief we were preparing to cut off our heads, but a voice from heaven forbade that attempt of ours saying, 'My sons, do no rash act, your friend shall return alive.' And then we were returning into the presence of your father, when on the way a man hurriedly advanced to meet us and said this 'You must not enter this city at present, for the king of it Vallabhaśakti is dead, and the ministers have with one accord conferred the royal dignity on Vikramasakti;