Mbh 5.10.4b

And the deities with the Gandharvas and Yakshas and Rakshasas, with the great snakes and saints, glorified the mighty Indra with various laudatory hymns. And saluted by all beings, Indra spoke words of encouragement to all. And his heart was glad as also that of everyone of the gods for having killed the foe. And knowing the nature of virtue, he worshipped Vishnu, the most praiseworthy of all objects in the world. Now when the mighty Vritra, terrible to the gods, was killed, Indra became overpowered by falsehood, and he became exceedingly sad; and he was also overpowered by the sin of Brahmanicide on account of having killed the three-headed son of Twashtri. And he betook himself to the confines of the worlds, and became bereft of his senses and consciousness. And overpowered by his own sins, he could not be recognised. And he lay concealed in water, just like a writhing snake. And when the lord of celestials, oppressed with the dread of Brahmanicide, had vanished from sight, the earth looked as if a havoc had passed over it. And it became treeless, and its woods withered; and the course of rivers was interrupted; and the reservoirs lost all their water; and there was distress among animals on account of cessation of rains. And the deities and all the great Rishis were in exceeding fear; and the world had no king, and was overtaken by disasters. Then the deities and the divine saints in heaven, separated from the chief of the gods, became terrified, and wondered who was to be their king. And nobody had any inclination to act as the king of the gods.’”