Bhagavad Gita 5.24 Chapter 5, Verse 24

योऽन्तःसुखोऽन्तरारामस्तथान्तर्ज्योतिरेव यः ।
स योगी ब्रह्मनिर्वाणं ब्रह्मभूतोऽधिगच्छति ॥५.२४॥

yo'ntaḥsukho'ntarārāmastathāntarjyotireva yaḥ
sa yogī brahmanirvāṇaṃ brahmabhūto'dhigacchati

Meaning

One whose happiness is within, whose delight is within and whose light is within — that yogi, one with Brahman, attains the bliss of Brahman.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 5.24 (Chapter 5, The Yoga of Renunciation (Karma Sannyasa Yoga), Verse 24)