2 Chronicles 35:1
Josiah observed the Passover to the LORD in Jerusalem. They slaughtered the Passover on the fourteenth day of the first month.
Exodus 12:6
It is to remain under your care until the fourteenth day of this month, and then the entire assembly of the congregation of Israel is to slaughter it at twilight.
Numbers 9:3
on the fourteenth day of this month. You are to observe it at this appointed time between the evenings. You are to observe it according to all its decrees and laws."
2 Kings 23:21-23
After this, the king commanded all of the people, "Celebrate the Passover to the LORD your God, just as it's prescribed in this Book of the Covenant."
Ezra 6:19
The former exiles observed the Passover on the fourteenth day of the first month
Deuteronomy 16:1-8
You are not to sacrifice to the LORD your God an ox or a sheep that has a defect or any flaw in it, because that is detestable to the LORD your God."
2 Chronicles 30:1-27
Hezekiah also sent word to all of Israel and Judah, and wrote letters to Ephraim and Manasseh that they should come to the LORD's Temple in Jerusalem to observe the Passover to the LORD God of Israel.
Ezekiel 45:21
""On the fourteenth day of the first month, you are to observe the Passover as a festival for seven days. Unleavened bread is to be eaten.