For this reason the Lord commanded the children of Israel to observe the passover on the day of its fixed time, and they shall not break a bone thereof; for it is a festival day, and a day commanded, and there may be no passing over from day to day, and month to month, but on the day of its festival let it be observed.
And do thou command the children of Israel to observe the passover throughout their days, every year, once a year on the day of its fixed time, and it will come for a memorial well pleasing before the Lord, and no plague will come upon them to slay or to smite