Exodus 12:47

‘But the man who is clean and is not on a journey, and yet neglects to celebrate the Passover, that person shall then be cut off from his people, for he did not bring near the offering of Yahweh at its appointed time. That man will bear his sin.

For a multitude of the people, even many from Ephraim and Manasseh, Issachar, and Zebulun, had not cleansed themselves, yet they ate the Passover otherwise than what was written. For Hezekiah prayed for them, saying, “May Yahweh, who is good, atone

when you brought in foreigners, uncircumcised in heart and uncircumcised in flesh, to be in My sanctuary to profane it, even My house, when you brought near My food, the fat and the blood. So they made My covenant void—this in addition to all your abominations.

By faith he kept the Passover and the sprinkling of the blood, so that he who destroyed the firstborn would not touch them.