Thirty Minor Upanishads
Chapters
Thirty Minor Upanishads: 21. Naraḍaparivrājaka...

"Therefore, O Muni, the recitation of manṭras is stated to be in āṭura-sannyāsa. One who is always duly doing agnihoṭra (fire-sacrifice) should, when he quits (the house) for foreign places through indifference, perform the prājāpaṭya sacrifice in water and then take up sannyāsa. After completing in water the observances of karma through the mind, or the recitation of manṭras, the wise man should attain sannyāsa. Else he becomes a fallen man. When, in the mind, indifference to all objects arises, then men should long after sannyāsa, (that being the best time for it); otherwise they are fallen. One who attains vairāgya should take sannyāsa. One who does not, should remain at home. That vile twice-born with desire, should he take sannyāsa, reaches hell. That Brāhmaṇa who is a celibate, who has under control his tongue, sexual organ, stomach, and hand may become a sannyāsin without undergoing the ceremony of marriage. Having known samsāra as one without sāra (or essence) and not having undergone any marriage on account of the desire to know the sāra (or essence of God), they become sannyāsins on account of the practice of the supreme vairāgya. The characteristic of pravṛṭṭi (path) is the performance of karma; that of nivṛṭṭi is jñāna. Therefore placing jñāna in the forefront, the wise man should take up sannyāsa. When the reality of the eternal Parabrahman is understood, then he should take up one ḍaṇda (staff) and abandon the holy thread and tuft of hair. Then he becomes fit to eat the alms-food (of sannyāsa), having become devoted to Paramāṭmā, indifferent to those that are not-Paramāṭmā and freed from all desires. He becomes fit to be the eater of