Sumer
Sumer () is the earliest known civilization in the historical region of southern Mesopotamia, modern-day southern Iraq, during the Chalcolithic and Early Bronze ages, and one of the first civilizations in the world along with Ancient Egypt and the Indus Valley. Living along the valleys of the Tigris and Euphrates, Sumerian farmers were able to grow an abundance of grain and other crops, the surplus of which enabled them to settle in one place. Prehistoric proto-writing dates back before 3000 BC. The earliest texts, from c. 3300 BC, come from the cities of Uruk and Jemdet Nasr; early cuneiform script emerged around 3000 BC.
Sanskrit
The earliest known stone inscriptions in Sanskrit are in the Brahmi script from the first century BCE. These include the Ayodhyā (Uttar Pradesh) and Hāthībādā-Ghosuṇḍī (near Chittorgarh, Rajasthan) inscriptions. Both of these, states Salomon, are "essentially standard" and "correct Sanskrit", with a few exceptions reflecting an "informal Sanskrit usage". Other important Hindu inscriptions dated to the last centuries of the 1st millennium BCE, in relatively accurate classical Sanskrit and Brahmi script are the Yavanarajya inscription on a red sandstone slab and the long Naneghat inscription on the wall of a cave rest stop in the Western Ghats.