Buddhacarita by Ven Asvaghosa - Ancient Buddhist Texts

Buddha-carita, or Life of Buddha - 151
62. ‘But another wise man, having contracted his soul which is by
nature extended everywhere like the ether, – as he gazes ever further
on, detects a yet higher distinction.
63. ‘Another one of those who are profoundly versed in the supreme
Self, having abolished himself by himself, sees that nothing exists and
is called a Nihilist.
64. ‘Then like the Muñja-reed’s stalk from its sheath or the bird from
its cage, the soul, escaped from the body, is declared to be "liberated."
65. ‘This is that supreme Brahman, constant, eternal, and without
distinctive signs; which the wise who know reality declare to be
liberation.
66. ‘Thus have I shown to thee the means and liberation; if thou hast
understood and approved it, then act accordingly.
67. ‘Jaigīṣavya and Janaka, and the aged Parāsara, by following this
path, were liberated, and so were others who sought liberation.’
68. The prince having not accepted his words but having pondered
them, filled with the force of his former arguments, thus made
answer:
69. ‘I have heard this thy doctrine, subtil and pre-eminently
auspicious, but I hold that it cannot be final, because it does not teach
us how to abandon this soul itself in the various bodies.