Śatapatha Brāhmaṇa ("of a hundred paths") 5.4.2.6

5.4.2.6

athainamantareva śārdūlacarmaṇi viṣṇukramānkramayati | viṣṇorvikramaṇamasi viṣṇorvikrāntamasi viṣṇoḥ krāntamasītīme vai lokā viṣṇorvikramaṇaṃ viṣṇorvikrāntaṃ viṣṇoḥ krāntaṃ tadimāneva lokāntsamāruhya sarvamevedamuparyupari bhavatyarvāgevāsmādidaṃ sarvam bhavati

He then makes him step the (three) Vishnu-steps within (the extent of) the tiger's skin, with, 'Vishnu's outstepping thou art! Vishnu's outstep thou art! Vishnu's step thou art!' Now Vishnu's outstepping (vikramana), Vishnu's outstep (vikrânta), and Vishnu's step (krânta) are these (three) worlds: thus having ascended these worlds, he is high above everything here, and everything here is below him.