Exodus 12:14
14 “This day shall be tfor you a memorial day, and you shall keep it as a feast to the Lord; throughout your generations, as a ustatute forever, you shall keep it as a feast.
Numbers 16:40
40 to be a reminder to the people of Israel, so ythat no outsider, who is not of the descendants of Aaron, should draw near to burn incense before the Lord, lest he become like Korah and his company—as the Lord said to him through Moses.