The Saba'a Stele, also known as the Saba'a Inscription, is a boundary stone inscription of the reign of Adad-nirari III (811 to 783 BC) discovered in 1905 in two pieces in Saba'a, Sanjak of Zor, south of the Sinjar Mountains in modern Syria. It is the primary source for the military campaigns of Adad-nirari III.