Kena Upanishad Verse 4.8 (33)
The Upanishad concludes by defining the foundation of this sacred wisdom. It emphasizes that spiritual realization is built upon the pillars of self-effort (tapas), self-control (dama), and dedicated action (karma), with the Vedas as its limbs and Truth as its ultimate abode.
Sanskrit Verse
तसै तपो दमः कर्मेति प्रतिष्ठा वेदाः सर्वाङ्गानि सत्यमायतनम् ॥ ३३ ॥
Transliteration
tasai tapo damaḥ karmeti pratiṣṭhā vedāḥ sarvāṅgāni satyamāyatanam || 33 ||
Translation
Tapas (austerity), Dama (self-control) and Karma (dedicated work) are its foundation; the Vedas are its limbs; Truth is its dwelling place.

Muni's Play