Devibhagavatapurana 4.14.53

4.14.53

provāca vacanaṃ śakraṃ ko'tra śokaḥ śatakrato |
yathā viṣṇurmahātejā matsyakacchapatāṃ gataḥ ||

O Indra, there is nothing to be sorry in these matters. When the most powerful Visnu can assume fish and tortoise incarnations, then what wonder is there that I by virtue of the force of Time, am now staying as an ass? When you had murdered a Brâhman, you, too had hid yourself in the Mânasa lake in the lotuses; similarly today distressed, I am staying here in this ass body.