Saurapurana 41.155

41.155

śrīviṣṇuruvāca -- bhagavandevadeveśa paramātmañśivāvyaya
niścalā tvayi me bhaktirbhavatviti varo mama

Lord Viṣṇu said: / “O Lord, O Lord of gods, supreme self, auspicious, imperishable one, / may my devotion to you be unwavering—this is my boon.”