Rahab, was, according to the Book of Joshua

Book of Joshua

The Book of Joshua is the sixth book in the Hebrew Bible and of the Old Testament. Its 24 chapters tell of the entry of the Israelites into Canaan, their conquest and division of the land under the leadership of Joshua, and of serving God in the land....

, a woman who lived in Jericho

Jericho

Jericho ; is a city located near the Jordan River in the West Bank of the Palestinian territories. It is the capital of the Jericho Governorate and has a population of more than 20,000. Situated well below sea level on an east-west route north of the Dead Sea, Jericho is the lowest permanently...

 in the Promised Land

Promised land

The Promised Land is a term used to describe the land promised or given by God, according to the Hebrew Bible, to the Israelites, the descendants of Jacob. The promise is firstly made to Abraham and then renewed to his son Isaac, and to Isaac's son Jacob , Abraham's grandson...

 and assisted the Israelites in capturing the city. Nearly all English translations of Joshua describe her as a harlot or prostitute.
There has been some disagreement among scholars as to whether Rahab actually was a prostitute, the puritan pastor van der Zee argues that she might be an inn-keeper. The medieval Jewish commentator Rashi

Rashi

Shlomo Yitzhaki , or in Latin Salomon Isaacides, and today generally known by the acronym Rashi , was a medieval French rabbi famed as the author of a comprehensive commentary on the Talmud, as well as a comprehensive commentary on the Tanakh...

 claims she was a food-seller.