Jñāneśvarī (commentary on the Bhagavadgītā) 2.338

2.338

prasāde sarvaduḥkhānāṃ hānir asyopajāyate
prasannacetaso hy āśu buddhiḥ paryavatiṣṭhate
dekheṃ akhaṃḍita prasannatā |
āthī jetha cittā |
tetha rigaṇeṃ nāhīṃ samastāṃ |
saṃsāraduḥkhāṃ ||

See, where unceasing serenity
abides in the mind,
there all the miseries
of the cycle of worldly existence find no entry.