fakirism
Fakirism is a spiritual practice found in several religions, most notably Islam and Hinduism, though similar ascetic traditions exist in other faiths. The term "fakir" itself originates from the Arabic word for "poor" and generally refers to a Muslim mystic or dervish who has renounced worldly possessions and comforts. Fakirs often engage in ascetic practices, such as fasting, solitude, and self-mortification, as a means of seeking spiritual enlightenment and closeness to God. These practices can include prolonged periods of prayer, meditation, and sometimes dramatic physical feats designed to transcend the material world.
In Hinduism, the equivalent concept is often associated with sadhus or yogis who follow paths of renunciation