Bhagavad Gita 6.22

यं लब्ध्वा चापरं लाभं मन्यते नाधिकं ततः। यस्मिन्स्थितो न दुःखेन गुरुणापि विचाल्यते

yaṁ labdhvā chāparaṁ lābhaṁ manyate nādhikaṁ tataḥ yasmin sthito na duḥkhena guruṇāpi vichālyate

Which, having obtained, he thinketh there is no greater gain beyond it; wherein, established, he is not shaken even by heavy sorrow;