Numbers 33:3-5

New International Version - UK

³ The Israelites set out from Rameses on the fifteenth day of the first month, the day after the Passover. They marched out defiantly in full view of all the Egyptians, ⁴ who were burying all their firstborn, whom the Lord had struck down among them; for the Lord had brought judgment on their gods.

⁵ The Israelites left Rameses and camped at Sukkoth.