Bhagavad Gita 5.24

योऽन्त: सुखोऽन्तरारामस्तथन्तज्र्योतिरेव य:।
स योगी ब्रह्मनिर्वाणं ब्रह्मभूतोऽधिगच्छति

Translation

Those who are happy within themselves, enjoying the delight of God within, and are illumined by the inner light, such yogis are united with the Lord and are liberated from material existence.