Bhagavad Gita 2.14

मात्रास्पर्शास्तु कौन्तेय शीतोष्णसुखदु: खदा: |
आगमापायिनोऽनित्यस्तस्तितिक्षस्व भारत

Translation

O son of Kunti, the contact between the senses and the sense objects gives rise to fleeting perceptions of happiness and distress. These are non-permanent, and come and go like the winter and summer seasons. O descendent of Bharat, one must learn to tolerate them without being disturbed.