Numbers 9:4-6

New Century Version

⁴ So Moses told the Israelites to celebrate the Passover, ⁵ and they did; it was in the Desert of Sinai at twilight on the fourteenth day of the first month. The Israelites did everything just as the Lord commanded Moses.

⁶ But some of the people could not celebrate the Passover on that day because they were unclean from touching a dead body. So they went to Moses and Aaron that day and