Parallel
Exodus 12:17
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
And ye shall observe the feast of unleavened bread; for in this selfsame day have I brought your armies out of the land of Egypt: therefore shall ye observe this day in your generations by an ordinance for ever.
So you are to keep the Feast of Unleavened Bread (note: That is, the seven-day period after the Passover during which no leaven may be eaten), for on this very day I brought your divisions out of the land of Egypt. You must keep this day as a permanent statute for the generations to come.