If a resident alien lives with you and wants to observe the LORD's Passover, let him observe it according to the statutes and laws of the Passover. You are to maintain the same statute for the resident alien as you do for the native of the land."

"The Israelis are to observe the Passover at its appointed time

So Moses instructed the Israelis to observe the Passover.

They observed the Passover on the fourteenth day of the first month at twilight, in the Wilderness of Sinai. The Israelis did everything that the LORD had commanded through Moses.

But there were men who couldn't observe the Passover that day because they had come in contact with a corpse. That very day, they approached Moses and Aaron

"Instruct the Israelis that when any of you or your descendants becomes unclean due to contact with a corpse, or if he is on a long journey, he nevertheless is to observe the LORD's Passover.

They are not to leave any of it to remain until morning nor are they to break any of its bones. They are to observe it according to all the statutes of the Passover.

Now as to the person who is clean and isn't traveling, but fails to observe the Passover, that person is to be eliminated from his people, because he didn't bring an offering to the LORD at its appointed time. That person is to bear his sin.

"The LORD's Passover is to take place on the fourteenth day of the first month.

They departed from Rameses in the first month, on the fifteenth day of that first month. The day after the Passover, the Israelis came out confidently, and all the Egyptians watched them leave,