Śrī brahma-saṁhitā 5.17

Thereupon the same great personal Godhead, assuming the threefold forms of Viṣṇu, Prajāpati and Śambhu, entering into the mundane universe, plays the pastimes of preservation, creation and destruction of this world. This pastime is contained in the mundane world. Hence, it being perverted, the Supreme Lord, identical with Mahā-Viṣṇu, prefers to consort with the goddess Yoganidrā, the constituent of His own spiritual [cit] potency full of the ecstatic trance of eternal bliss appertaining to His own divine personality.