O King, when such a mystic passes over the Milky Way by the illuminating Suṣumṇā to reach the highest planet, Brahmaloka, he goes first to Vaiśvānara, the planet of the deity of fire, wherein he becomes completely cleansed of all contaminations, and thereafter he still goes higher, to the circle of Śiśumāra, to relate with Lord Hari, the Personality of Godhead.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वैश्वानरं याति विहायसा गतः सुषुम्णया ब्रह्मपथेन शोचिषा । विधूतकल्कोऽथ हरेरुदस्तात् प्रयाति चक्रं नृप शैशुमारम्
vaiśvānaraṃ yāti vihāyasā gataḥ suṣumṇayā brahmapathena śociṣā | vidhūtakalko'tha harerudastāt prayāti cakraṃ nṛpa śaiśumāram
SB 2.2.24