Bhagavad Gita 6.22

यं लब्ध्वा चापरं लाभं मन्यते नाधिकं तत: |
यस्मिनस्थितो न दु:खेन गुरुणापि विचाल्यते

Translation

Having gained that state, one does not consider any attainment to be greater. Being thus established, one is not shaken even in the midst of the greatest calamity.