Numbers 33:3
On the fifteenth day of the first month, on the day after the Passover, the Israelites set out from Rameses. They marched out defiantly in full view of all the Egyptians,
Berean Standard Bible
And they departed from Rameses in the first month, on the fifteenth day of the first month; on the morrow after the passover the children of Israel went out with an high hand in the sight of all the Egyptians.
They traveled from Rameses in the first month, on the fifteenth day of the first month; on the next day after the Passover, the children of Israel went out with a high hand in the sight of all the Egyptians,