Paritta (Pali), generally translated as "protection" or "safeguard," refers to the Buddhist practice of reciting certain verses and scriptures in order to ward off misfortune or danger, as well as to the specific verses and discourses recited as paritta texts. The practice of reciting or listening to the paritta suttas began very early in the history of Buddhism.
In the Pali literature, these short verses are recommended by the Buddha as providing protection from certain afflictions. The belief in the effective power to heal, or protect, of the sacca-kiriya, or asseveration of something quite true is an aspect of the work ascribed to the paritta.
It is also widely believed that all-night recitations of paritta by monks bring safety, peace and well-being to a community. Such recitations will also occur on auspicious occasions, such as the inauguration of a new temple or home or to provide blessings upon those who hear. Conversely, paritta discourses are recited on inauspicious occasions as well, such as at a funeral or on the death anniversary of a loved one. They may also be recited to placate antagonistic spirits. The Mahavamsa contains the earliest historical reference to this practice, describing how Upatissa I of Anuradhapura instructed monks to recite the Ratana Sutta through the night during a period when Sri Lanka was afflicted by plague and disease.
There are several paritta verses that are identified as such within the Pali Canon.
Most paritta involve offering praise to the Buddha or, more broadly, the Triple Gem (Buddha, Dhamma, Sangha). Of these paritta, one of the best known is the Ratana Sutta (Sn 2.1) where, for instance, it states in part:
Whatever treasure there be either here or in the world beyond, whatever precious jewel there be in the heavenly worlds, there is nought comparable to the Tathagata (the Perfect One). This precious jewel is the Buddha. By this (asseveration of the) truth may there be happiness.
A few paritta involve the asking directly for the aid of the Buddha.