In Hinduism, sadhu is a common term for an ascetic or someone who practices yoga (yogi). Sadhus have given up trying to achieve the first three Hindu goals of life: kama (enjoyment), artha (practical objectives) and even dharma (duty). The sadhu is solely dedicated to achieving moksha (liberation) through meditation and contemplation of God. Sadhus often wear ochre-colored clothing, as a symbol that they have given up many things in life.
'Sādhu!' is also a Sanskrit term used as an exclamation for something novel.
Books on sâdhus:
- Sâdhus, Going beyond the dreadlocks, by Patrick Levy, published by Prakash Books, Delhi, 2010.
- Sadhus,Un voyage initiatique chez les ascètes de l'Inde, by Patrick Levy, Editions du Relié, 2009,
 The website of this author.
Sadhu Facts for Kids. Kiddle Encyclopedia.