Vasiṣṭha's teaching (Mahārāmāyaṇa) 6.54.2

6.54.2

mātrāsparśā hi kaunteya śītoṣṇasukhaduḥkhadāḥ .
āgamāpāyino nityāstāṃstitikṣasva bhārata .. 2

2. [Sanskrit available] Know O progeny of Kunti, that the perception of the senses, or the feelings conveyed to our minds by the organic sense, such as those of cold and heat and the like, are the causes of our bodily pleasure and pain; but as these are transitory, and come to us and pass away by turns, you must remain patient under them.