Skandapurana 6.3.194.14

6.3.194.14

tāṃ tasmāttatra gatvāhaṃ varaṃ dattvā tu vāñchitam .
punastapaḥ kariṣyāmi darśayiṣyāmi vā punaḥ .
vaiṣṇavaṃ viśvarūpaṃ yaddurdaśyaṃ devadānavaiḥ .. 194.14 ..

Therefore, having gone there and granted her the desired boon, / I shall practice austerity again, or I shall show again / that universal form belonging to Viṣṇu, difficult to see for gods and demons." // 194.14