Mahabharata — Anushasana Parva, Shloka 108
आचारप्रशंसा
Praise of Ācāra as the Basis of Longevity, Fame, and Prosperity
दिनमें कभी मैथुन न करे। कुमारी कन्या और कुलटाके साथ कभी समागम न करे। अपनी पत्नी भी जबतक ऋतुस्नाता न हो तबतक उसके साथ समागम न करे। इससे मनुष्यको बड़ी आयु प्राप्त होती है ।।
divā kadācid maithunaṁ na kuryāt | kumārī-kanyayā saha ca kulaṭayā saha ca kadācid api samāgamaṁ na kuryāt | svāṁ bhāryām api yāvat ṛtu-snātaṁ na bhavati tāvat tayā saha samāgamaṁ na kuryāt | etena manuṣyo dīrgham āyur avāpnoti || sve sve tīrthe samācamya kārye samupakalpite | triḥ pītvāpo dviḥ pramṛjya kṛta-śauco bhaven naraḥ ||
毗湿摩说道：白昼不可行淫；不可与未嫁之女交合，亦不可与淫荡之妇交合。即便是自己的妻子，也当待其经期开始后沐浴净身，方可亲近。以此节制，人得长寿。又，当职责在前，应于自己所属的净水处行阿遮摩那（ācamana），啜水三次，拭唇两次；如此，男子便为所行之事获得仪式上的清净。
भीष्म उवाच
Educational Q&A
Bhishma teaches disciplined sexual ethics—avoiding improper partners and times, and observing the wife’s post-menstrual ritual readiness—along with basic rules of ācamana for ritual cleanliness; such self-restraint and purity are said to support longevity and dharmic living.
In Anushasana Parva, Bhishma is instructing Yudhishthira on dharma and right conduct. Here he gives practical injunctions for householders: restraints regarding sexual conduct and a brief procedural rule for purification (ācamana) when undertaking a task.