Skandapurana 1.3.4.33

1.3.4.33

..devā ūcuḥ..
asya mūlaṃ tvayā viṣṇo padmodbhava ca mastakam..
yuvābhyāṃ ca vilokyaṃ syātsthāne syātparipālakau.. 6.33 ..

The gods said:
“Its base [should be seen] by you, O Viṣṇu, and its head by you, O lotus-born [Brahmā]! / It should be looked for by you two; in this position, be its protectors!”