Vishnu Purana 4.9.6

4.9.6

avajitārātipakṣaś cendro rajicaraṇayugalam ātmaśirasā nipīḍyāha |
bhayatrāṇadānād asmatpitā bavān aśeṣalokānām uttamo bhavān yasyāhaṃ putras trilokendraḥ ||

When the demons were discomfited, Indra placed the feet of Raji upon his head, and said, "Thou hast preserved me from a great danger, and I acknowledge thee as my father; thou art the sovereign chief over all the regions, and I, the Indra of the three spheres, am thy son." The Rájá. smiled, and said, "Even be it so. The regard that is conciliated by many agreeable speeches is not to be resisted even when such language proceeds from a foe (much less should the kind words of a friend fail to win our affection)." He accordingly returned to his own city, and Indra remained as his deputy in the government of heaven.