Bhagavatapurana 6.11.19

6.11.19

sureśa kasmān na hinoṣi vajraṃ puraḥ sthite vairiṇi mayy amogham /
mā saṃśayiṣṭhā na gadeva vajraḥ syān niṣphalaḥ kṛpaṇārtheva yācñā //

19. O Lord of the gods, why dost thou not send thy Vajra of unfailing power against me, thy enemy, standing before thee? Do not doubt that like gada Vajra may prove ineffectual like the request made for some purpose to the coveteous.