Numbers 33:3 (KJV)
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
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