Mbh 1.30.8

“And various omens began to appear among the gods foreboding fear. Indra’s favourite thunderbolt blazed up in a fright. Meteors with flames and smoke, loosened from the welkin, shot down during the day. And the weapons of the Vasus, the Rudras, the Adityas, the Sabhyas, the Maruts, and other gods, began to spend their force against one another. Such a thing had never happened even during the war between the gods and the Asuras. And the winds blew accompanied with thunder, and meteors fell by thousands. And the sky, though cloudless, roared tremendously. And even he who was the god of gods shed showers of blood. And the flowery garlands on the necks of the gods faded and their prowess suffered diminution. And terrible masses of clouds dropped thick showers of blood. And the dust raised by the winds darkened the splendour of the very coronets of the gods. And He of a thousand sacrifices (Indra), with the other gods, perplexed with fear at the sight of those dark forebodings spoke unto Vrihaspati thus, ‘Why, O worshipful one, have these natural disturbances suddenly arisen? No foe do I behold who would oppress us in war.’ Vrihaspati answered, ‘O chief of the gods, O thou of a thousand sacrifices, it is from thy fault and carelessness, and owing also to the ascetic penance of the high-souled great Rishis, the Valakhilyas, that the son of Kasyapa and Vinata, a ranger of the skies endued with great strength and possessing the capacity of assuming at will any form, is approaching to take away the Soma. And that bird, foremost among all endued with great strength, is able to rob you of the Soma. Everything is possible with him; the unachievable he can achieve.’