New Revised Standard Version
You shall observe the festival of unleavened bread, for on this very day I brought your companies out of the land of Egypt: you shall observe this day throughout your generations as a perpetual ordinance.

Contemporary English Version
Celebrate this Festival of Thin Bread as a way of remembering the day that I brought your families and tribes out of Egypt. And do this each year.

New American Bible
Keep, then, the custom of the unleavened bread, since it was on this very day that I brought your armies out of the land of Egypt. You must observe this day throughout your generations as a statute forever.

Douay-Rheims Bible
And you shall observe the feast of the unleavened bread: for in this same day I will bring forth your army out of the land of Egypt, and you shall keep this day in your generations by a perpetual observance.

And you shall observe the feast of the unleavened bread: for in this same day I will bring forth your army out of the land of Egypt, and you shall keep this day in your generations by a perpetual observance.

in this selfsame

Exodus 7:5 And the Egyptians shall know that I am the Lord, who have stretched forth my hand upon Egypt, and have brought forth the children of Israel out of the midst of them.

Exodus 13:8 And thou shalt tell thy son in that day, saying: This is what the Lord did to me when I came forth out of Egypt.

Numbers 20:16 And how we cried to the Lord, and he heard us, and sent an angel, who hath brought us out of Egypt. Lo, we are now in the city of Cades, which is in the uttermost of thy borders,

an ordinance

Exodus 12:14 And this day shall be for a memorial to you; and you shall keep it a feast to the Lord in your generations, with an everlasting observance.