In Brahmin Hindu culture, a Pravara (Sanskrit for "most excellent") is a particular Brahmin's descent from a rishi (sage) who belonged to their gotra (clan). In vedic ritual, the importance of the pravara appears to be in its use by the ritualist for extolling his ancestry and proclaiming, "as a descendant of worthy ancestors, I am a fit and proper person to do the act I am performing." Generally, there are three,five or seven pravaras. The sacred thread yajnopavita worn on upanayana has close and essential connection with the concept of pravaras related to Brahmin gotra system. While tying the knots of sacred thread, an oath is taken in the name of each one of these three,five or seven of the most excellent rishis belonging to one's gotra.