Bhagavad-gītā 4.18
BG 4.18
Open the full passageकर्मण्यकर्म यः पश्येदकर्मणि च कर्म यः । स बुद्धिमान्मनुष्येषु स युक्तः कृत्स्नकर्मकृत् ॥१८॥
Sanskrit
karmaṇy akarma yaḥ paśyed akarmaṇi ca karma yaḥ sa buddhimān manuṣyeṣu sa yuktaḥ kṛtsna-karma-kṛt
Translation
One who sees inaction in action, and action in inaction, is intelligent among men, and he is in the transcendental position, although engaged in all sorts of activities.