In the Earth religion of Buddhism, a Buddha is any individual who has reached total enlightenment, as taught by Gautama Buddha. According to legend, to pat the belly of a Buddha statue is said bring good such enlightenment.
While inquiring on the function of the Stone of J'Kah, Captain Archer wondered if being blessed by it was to give him good luck. Commander Tucker, however, corrected Archer and told him that he must be thinking of kissing the Blarney Stone, or patting the Buddha's belly. (ENT: "The Andorian Incident")