Vedic Sanskrit was both a spoken and literary language of ancient India. According to Michael Witzel, Vedic Sanskrit was a spoken language of the semi-nomadic Aryas who temporarily settled in one place, maintained cattle herds, practiced limited agriculture, and after some time moved by wagon trains they called "grama". The Vedic Sanskrit language or a closely related Indo-European variant was recognized beyond ancient India as evidenced by the "Mitanni Treaty" between the ancient Hittite and Mitanni people, carved into a rock, in a region that are now parts of Syria and Turkey. Parts of this treaty such as the names of the Mitanni princes and technical terms related to horse training, for reasons not understood, are in early forms of Vedic Sanskrit. The treaty also invokes the gods Varuna, Mitra, Indra, and Nasatya found in the earliest layers of the Vedic literature.