Nāradaparivrājaka Upaniṣad 5.25

5.25

mitrādiṣu samo maitraḥ samasteṣveva jantuṣu |
eko jñānī praśāntātmā sa santarati netaraḥ ||

He should always he a practiser of veḍānṭa, being master of the mind, the body and the organs, being without fear and egoism, with a firm mind, without the pairs (of opposites), without attaching himself to any, having a worn-out loin-cloth, and being bald-headed or naked. He should have the great intelligence of the knower of veḍānṭa, a yogin without 'I' and 'mine' and being equal and friendly to friends and other beings. That jñānī alone and none else is able to cross samsāra who has his mind at peace. With the grace of the guru towards him, he should live with him for one year. He should be careful to observe yama (restraint) and niyama (religious observance). At the end of that (year), he should attain the supreme jñāna-yoga, and roam about on this earth without going against ḍharma; (or) at the end of one year, he should give up the three orders of life and attain the chief āśrama (of sannyāsa), as well as the supreme jñāna-yoga. Then, taking leave of the guru, he should wander over the earth, having given up association (with wife, etc., as well as anger, and being content with moderate food and having controlled the senses. The householder who does not perform karma, and the ascetic who performs karma—both become fallen through their perverse doings. Each becomes intoxicated through seeing women. Each becomes intoxicated through drinking alcohol. Therefore women, mere sight of whom is poison, should be shunned at a distance.