Vayu Purana · Verses 17-2

// vāyuruvāca //
āśramatrayamutsṛjya prāptastu paramāśramam/
ataḥ saṃvatsarasyānte prāpya jñānamanuttamam

anujñāpya gurūṃcaiva vicaret pṛthivīmimām/
sārabhūtamupāsīta jñānaṃ yajjñeya sādhakam

idaṃ jñānamidaṃ jñeyamiti yastuṣitaścaret /
api kalpasahasrāyurnnaiva jñeyamavāpnuyāt

tyaktasaṅgo jitakodho laghvāhāro jitendriyaḥ/
pidhāya buddhyā dvārāṇi dhyāne hyevaṃ mano dadhet

śūnyeṣvevāvakāśeṣu guhāsu cavane tathā/
nadīnāṃ puline caiva nityaṃ yuktaḥ sadā bhavet

vāgdaṇḍaḥ karmadaṇḍaśca manodaṇḍaśca te trayaḥ/
yasyaite niyatā daṇḍāḥ sa tridaṇḍī vyavasthitaḥ

avasthito dhyānaratirjitendriyaḥ śubhāśubhe hitya ca karmaṇī ubhe /
idaṃ śarīraṃ pravimucya śāstrato na jāyate mriyate vā kadācit

iti śrīmahāpurāṇe vāyuprokte paramāśramaprāptikathanaṃ nāma saptadaśo'dhyāyaḥ