Katha Upanishad Verse 1.3.11

The hierarchy concludes at the ultimate summit. Beyond the Great Atman (Mahat) is the Unmanifested (Avyakta); beyond the Unmanifested is the Purusha (the Cosmic Soul). Beyond the Purusha, there is nothing higher; this is the final goal.

Sanskrit Verse

महतः परमव्यक्तमव्यक्तात्पुरुषः परः ।
पुरुषान्न परं किंचित्सा काष्ठा सा परा गतिः ॥ ११ ॥

Transliteration

mahataḥ paramavyaktamavyaktātpuruṣaḥ paraḥ |
puruṣānna paraṃ kiṃcitsā kāṣṭhā sā parā gatiḥ || 11 ||

Translation

Beyond the great Ātman is the Unmanifested; beyond the Unmanifested is the Puruṣa (the Cosmic Soul); beyond the Puruṣa there is nothing. That is the end that is the final goal.