Sikhism, founded in fifteenth century Punjab on the teachings of Guru Nanak Dev and ten successive Sikh Gurus (the last one being the sacred text Guru Granth Sahib), is the fifth-largest organized religion in the world. This system of religious philosophy and expression has been traditionally known as the Gurmat (literally the counsel of the gurus) or the Sikh Dharma. Sikhism originated from the word Sikh, which in turn comes from the Sanskrit root śiṣya meaning "disciple" or "learner", or śikṣa meaning "instruction".