On the fourteenth day of this month, at twilight, y’all are to observe it at its appointed season. Y’all are to keep it according to all its statutes and according to all its ordinances.”
Otherwise he would have to suffer over and over again since the foundation of the world. But now once at the end of the ages, he has been revealed to put away sin by the sacrifice of himself.
Then they killed the Passover on the fourteenth day of the second month. The priests and the Levites were ashamed, and sanctified themselves, and brought burnt offerings into the house of YHWH.