The exodus

The Exodus (from Greek ἔξοδος exodos, "going out") is the founding, or etiological, myth of Israel; its message is that the Israelites were delivered from slavery by Yahweh and therefore belong to him through the Mosaic covenant. It tells of the enslavement of the Israelites in Egypt following the death of Joseph, their departure under the leadership of Moses, the revelations at Sinai (including the Ten Commandments), and their wanderings in the wilderness up to the borders of Canaan. The exodus story is told in the books of Exodus, Leviticus, Numbers, and Deuteronomy, and their overall intent was to demonstrate God's actions in history, to recall Israel's bondage and salvation, and to demonstrate the fulfillment of Israel's covenant.

The historicity of the story continues to attract popular attention, but the archeological evidence does not support the historicity of the Book of Exodus. The opinion of the overwhelming majority of modern biblical scholars is that it was shaped into its final present form in the post-Exilic period, although the traditions behind it are older and can be traced in the writings of the 8th century BCE prophets. It is unclear how far beyond that the tradition might stretch: according to historian Carol Redmount, "Presumably an original Exodus story lies hidden somewhere inside all the later revisions and alterations, but centuries of transmission have long obscured its presence, and its substance, accuracy and date are now difficult to determine."

...
Wikipedia