The Bubastite Portal gate is located in Karnak, within the Precinct of Amun-Re temple complex, between the temple of Ramesses III and the second pylon. It records the conquests and military campaigns c. 925 BC of Shoshenq I, of the Twenty-second Dynasty. Shoshenq has been identified with the biblical Shishaq, such that the relief is also known as the Shishak Inscription or Shishaq Relief.

Hedjkheperre Setepenre Shoshenq I —also known as Shashank or Sheshonk or Sheshonq I—was a pharaoh of ancient Egypt and the founder of the Twenty-second Dynasty of Egypt. Of Meshwesh ancestry, Shoshenq I was the son of Nimlot A, Great Chief of the Ma, and his wife Tentshepeh A, a daughter of a Great Chief of the Ma herself; Shoshenq was thus the nephew of Osorkon the Elder, a Meshwesh king of the 21st Dynasty. He is generally presumed to be the Shishak mentioned in the Hebrew Bible, and his exploits are carved on the Bubastite Portal at Karnak.