Bhagavad Gītā Chapter Five verse 17
tadbuddhayas tadātmānas tanniṣṭhās tatparāyaṇāḥ |
gacchantyapunarāvṛttiṃ jñānanirdhūtakalmaṣāḥ ||
Commentaries and Reflections
Commentary by TKV Desikachar:
Niṣṭhā –
The holding of a question throughout the days activities.