Order of the Host – The Passover
And the Lord spoke to Moses and said unto him that on the first day of the second year after they had come out of the land of Egypt, and instructed him that he should make the children of Israel of Israel keep the Passover at the appointed time each year on the fourteens day of the month at evening. The Passover shall be kept in its appointed time and in according to the rites and ceremonies thereof.
And Moses spoke unto the children of Israel that they should keep the Passover and the children of Israel kept the Passover on the fourteenth day at evening in the wilderness of Sinai.
And at that time there were certain men who had been defiled by reason of the dead body of a men so that they could not keep the Passover on that day; so they came before Moses and Aaron and they admitted that they were defiled. And asked Moses what they should do seeing they were unable to keep the Passover. Moses told them that he would have to consult the Lord. Moses asked the Lord and the Lord told him that if anyone was unable to keep the Passover by reason of uncleanness or distance yet he shall keep the Passover unto the Lord subject to conditions.