Mahabharata 3.34.36

3.34.36

tasya nāśaṃ vināśaṃ vā jarayā maraṇena vā |
anarthamiti manyante so'yamasmāsu vartate || 36 ||

At their loss or disappearance occasioned by decrepitude or death, ariseth what is called distress. That distress, O king, hath now overtaken us. The joy that ariseth from the five senses, the intellect and the heart, being directed to the objects proper to each, is called pleasure. That pleasure, O king, is, as I think, one of the best fruits of our actions.