Kaṭha Upaniṣad 66

66

kiñ ca na prabhūtena vittena tarpaṇīyo manuṣyaḥ / na hi loke vittalābhaḥ kasyacit tṛptikaro dṛṣṭaḥ / yadi nāmāsmākaṃ vittatṛṣṇā syāl lapsyāmahe prāpsyāmahe vittam adrākṣma dṛṣṭavanto vayaṃ cet tvā tvām / jīvitam api tathaiva, jīviṣyāmo yāvad yāmye pade tvam īśiṣyasīśiṣyase prabhuḥ syāḥ / kathaṃ hi martyas tvayā sametyālpadhanāyur bhavet / varas tu me varaṇīyaḥ sa eva yadātmavijñānam ///1,1.27 //

Shankara’s Commentary:
Com.—Moreover, man is not to be satisfied with much wealth; for, attainment of wealth has not been found to ensure delight to anybody. If ever we have thirst for wealth, we shall get it, if we have seen thee; so also, long life; we shall live, as long as you rule in your place; for, how could a mortal, after approaching thee, become poor or short-lived. Therefore, the boon fit to be craved for by me is that alone, i.e., the knowledge of the atman.