In Indian religions, a rishi is an accomplished and enlightened person. They find mention in various Vedic texts. Rishis are believed to have composed hymns of the Vedas. The Post-Vedic tradition of Hinduism regards the rishis as "great yogis" or "sages" who after intense meditation (tapas) realized the supreme truth and eternal knowledge, which they composed into hymns. The term appears in Pali literature as Ishi; in Buddhism they can be either Buddhas, Paccekabuddhas, Arahats or a monk of high rank.