The yamas (Sanskrit: यम, romanized: yama), and their complement, the niyamas, represent a series of "right living" or ethical rules within Yoga philosophy. The word yama means "reining in" or "control". They are restraints for proper conduct given in the Vedas and the Yoga Sutras as moral imperatives, commandments, rules or goals. The yamas are a "don't"s list of self-restraints, typically representing commitments that affect one's relations with others and self. The complementary niyamas represent the "do"s. Together yamas and niyamas are personal obligations to live well.
The earliest mention of yamas is in the Rigveda. More than fifty texts of Hinduism, from its various traditions, discuss yamas. Patañjali lists five yamas in his Yoga Sūtras. Ten yamas are codified as "the restraints" in numerous Hindu texts, including Yajnavalkya Smriti in verse 3.313, the Śāṇḍilya and Vārāha Upanishads, the Hatha Yoga Pradipika by Svātmārāma, and the Tirumantiram of Tirumular.
