Genesis 45 records Joseph instructing his brothers to bring Jacob and the entire household to Egypt, promising that they would live in the land of Goshen and remain near him during the remaining years of famine.
Pharaoh subsequently permitted Joseph's family to settle in the best part of the land. Genesis 47 describes the Israelites acquiring possessions there, becoming fruitful, and multiplying greatly.
During the plagues, Goshen is explicitly distinguished from the rest of Egypt. Exodus 8:22 states that God would set apart Goshen so that no swarms of flies would be there, demonstrating a distinction between Israel and Egypt.