“And Moses said unto the people, Remember this day, in which ye came out from Egypt, out of the house of bondage; for by strength of hand the LORD brought you out from this place: there shall no leavened bread be eaten.”
King James Version (KJV)
13:2 Sanctify to me all the first - born - The parents were not to look upon themselves as interested in their first - born, till they had first solemnly presented them to God, and received them back from him again. It is mine - By a special right, being by my singular favour preserved from the common destruction.
13:5 When the lord shall bring you into the land, thou shalt keep this service - 'Till then they were not obliged to keep the passover, without a particular command from God.